Source: http://www.surrenderat20.net/2016/03/39-pbe-update.html
Edit: It"s actually a nerf. I looked too early.
You've got to be kidding me.
Yeah let's make a hardly mana champion more manaless. Thanks riot...
RiotMeddler32 votesThe intended change is to the slow % (down to 30% at all ranks). Sounds like either a patch tracking issue on S@20's part or someone here at Riot edited the wrong values by mistake.
We're also testing a shift of power in Fiora's passive damage from base to AD ratio, pushing her towards more offensive, less tanky builds.
Dreadlocks5 votesWe're also testing a shift of power in Fiora's passive damage from base to AD ratio, pushing her towards more offensive, less tanky builds.
Can i kiss you? (not literally)[slayer-jinx-wink]
metaworldpeace103 votesThe intended change is to the slow % (down to 30% at all ranks). Sounds like either a patch tracking issue on S@20's part or someone here at Riot edited the wrong values by mistake.
We're also testing a shift of power in Fiora's passive damage from base to AD ratio, pushing her towards more offensive, less tanky builds.
Good idea, because tanky bruiser Fiora is broken.
DJ S0NA2 votesMy bad, I looked at the changes too early. And thanks for the next follow up
Moobeat20 votesWOOPS THAT WAS ME.
Misread change at first, didn't quite change it fast enough - at a glance, E mana and slow % have same numbers so I got them mixed up!
Jeddy0173 votesSpeaking of pushing a champ towards less tanky builds,is tank 
on the radar?
Bherrias1 votesThe intended change is to the slow % (down to 30% at all ranks). Sounds like either a patch tracking issue on S@20's part or someone here at Riot edited the wrong values by mistake.
We're also testing a shift of power in Fiora's passive damage from base to AD ratio, pushing her towards more offensive, less tanky builds.
Uhh... It's already bonus AD. Unless it was bugged or Riot is illuminati
1374344 votesWhat he is saying is they are looking at decreasing the base damage and increasing the bonus AD scaling. So if Fiora wants to do the same damage, or more, as live she has to build more AD items (and consequently become squishier), and if the player wants to use the same tanky build popular now she will lose damage.
EvilRabbitt1 votesI'm all for this :D.
Areklis2 votesYeah, but so far, both the base damage and the bonus AD ratio are reduced. she will deal a lot less damage when opting to build AD
1374341 votesLate game versus live yes. From levels 1-13 she will be doing more/equal damage though (since it is moving to flat 4% per 100 bonus AD versus 2.8-4.5% increasing 0.1% every level).
Areklis2 votesMy point exactly. It was really hard to reach 25% already, even having to opt out of boots, now I will struggle to even reach 20%
1374342 votesThey don't want it to be easy to get that high and I don't blame them. You realize you are complaining about struggling to hit 1/5 (previously 1/4) of someone's MAX health in true damage from hitting one vital right? That is insane.
DeathBurst2 votesCould you comment on how you see tanky builds on Assassins/Light Fighter in general? Interesting alternative builds or not healthy for the game in general? Or is it too champion specific to set a global trend?
They seem to crop up regularly (Fizz and Ekko last year for instance), but the last batch has been pretty intense: we got Fiora/Yi/Akali/Elise in barely 2 or 3 patches. Is it unavoidable, or would you like to make some more systemic changes to avoid it?
Bisaknosp2 votesisnt 30% at all ranks a bit harsh? i mean yea she is too strong for quite some time now but with so many champions building 
30% seems very bad
wouldnt 40% at all ranks be more fair? or at least make it 30/35/40/45/50
gubigubi4 votesSomething like the AD ratio is exactly what should have been done from the start. This is more in the right direction.
InHaruhiWeTrust1 voteswhat are your thought on locking her passive behind lvl6 and reducing it's dmg overall? you would have to increase her base dmg of course but i think this would be a nice change since her passive mini game is very annoying and unfun for both fiora and her lane partner in the laneing phase IMO. her vital passive as really cool in outside laneing phase(especially team fights) but in lane it's not very fun since the game forces you and the enemy to play, when you just wanna farm and trade like normal. also, since the true dmg is reduced you could do other cool things like buff her Q dmg, but make in only reduce CD on vital hits.
JustBoneBrook1 votesThe intended change is to the slow % (down to 30% at all ranks). Sounds like either a patch tracking issue on S@20's part or someone here at Riot edited the wrong values by mistake.
We're also testing a shift of power in Fiora's passive damage from base to AD ratio, pushing her towards more offensive, less tanky builds.
Ok cool but could you give it A AP ratio too (I love playing the new fiora ap... or may be a crit ratio? I fell like she should be build arond crit but right not there no point on building crit on her.) SORRY FOR THE BAD ENGLISH
EvilRabbitt2 votesI really hope you don't gut her :C
On a side note, is there anyway you can make it possible for Fiora to jungle? I remember asking before the rework and right now its hard to get her jungle working at all (though my experience has been bots only as I've been testing clear potential). Maybe Vitals could apply to large, non-epic monsters?
Edit: Will you be looking into reducing the power of the current top-tier bruiser build? I believe its 
with black cleaver sometimes, though I might need to be corrected.
Keevalroy1 votesAny plans on hitting her W since we're adding nebulas to the long list of things she can easily deflect? Riposte is...preeetty absurd.
warpenguin5551 votesThe intended change is to the slow % (down to 30% at all ranks). Sounds like either a patch tracking issue on S@20's part or someone here at Riot edited the wrong values by mistake.
We're also testing a shift of power in Fiora's passive damage from base to AD ratio, pushing her towards more offensive, less tanky builds.
PRAISE THE LORD ITS FINALLY BEING EXTERMINATED! I SHALL BE BUYING RP AS SOON AS ITS DEAD.
So this one time1 votes"We're also testing a shift of power in Fiora's passive damage from base to AD ratio" so fio is gonna do ad scaling hp% true damage? riot. please. can u stop.
Critmaster Garen1 votesThe intended change is to the slow % (down to 30% at all ranks). Sounds like either a patch tracking issue on S@20's part or someone here at Riot edited the wrong values by mistake.
We're also testing a shift of power in Fiora's passive damage from base to AD ratio, pushing her towards more offensive, less tanky builds.
im kindof concerned about all these nerfs.
i mean the issue youre trying to tackle should be bruiser fiora. but seing riposte nerfed, and abilities that she relies on to be playable as a melee adc just seems to force her into this bruiser build (less survivability without stacking health now), while making her less effective with it.
why arent we seing more scaling changes to her, that reward her more for stacking damage, and less for stacking bruiser items, instead of just flat nerfs on her abilities?
how about changes that actually reward her for building critical strike and attack speed? right now attack speed is kindof useless on her, while building critical strike chance is actually counterproductive with the way her e works. (0% crit on first strike, 100% crit on second strike, makes the stat wasted)
have you thought about adding mechanics to her kit like yasuos q, that have some of her cooldowns scale with crit or attack speed? (riposte would be a good candidate, as its really the ability that allows her to be squishy in melee).
i think one of her main issues that allows her to get away with this bruiser build, is because she only scales off ad and cdr as offensive stats. so she has a lot of room to build into other stats, like health and armor.
KneeGrowsFarm1 votesThe intended change is to the slow % (down to 30% at all ranks). Sounds like either a patch tracking issue on S@20's part or someone here at Riot edited the wrong values by mistake.
We're also testing a shift of power in Fiora's passive damage from base to AD ratio, pushing her towards more offensive, less tanky builds. hope her armor increased a littlebit so she can be offensive and balanced.. not dying fast when she's fed :(
Miraweave1 votesThe intended change is to the slow % (down to 30% at all ranks). Sounds like either a patch tracking issue on S@20's part or someone here at Riot edited the wrong values by mistake.
We're also testing a shift of power in Fiora's passive damage from base to AD ratio, pushing her towards more offensive, less tanky builds.
Have you thought about making her scale with crit?
Having an extra required stat for damage would really force offensive builds.
Critmaster Garen1 votesHave you thought about making her scale with crit?
Having an extra required stat for damage would really force offensive builds.
crit is wasted alot due to her e. imo they could make ripostes cooldown scale with attack speed. that way a more squishy fiora who builds into offensive sats gets more survivability.
however i agree, that part of the problem is, that she doesnt scale with more than ad and cdr offensively right now. her bruiser build is also simply more reliable than her carry build.
maybe give her the quinn treatment and have her passive cooldown scale with crit, and riposte cooldown with attack speed. but then her e scaling should be changed to make use of the stats aswell.
AlwaysByMySide1 votesThe intended change is to the slow % (down to 30% at all ranks). Sounds like either a patch tracking issue on S@20's part or someone here at Riot edited the wrong values by mistake.
We're also testing a shift of power in Fiora's passive damage from base to AD ratio, pushing her towards more offensive, less tanky builds.
At level 14+ the scaling on her passive was nerfed, on top of its base damage, and early game you don't have enough bonus AD to make up for the nerf to base damage, so both early game and late game it is unquestionably a nerf. So there is a window of time mid game where Fiora can potentially do more damage by buying more AD, but it's at the cost of survivability and still won't scale as well.
It's just a nerf. It's not a shift in power. Why call it anything else?
Areklis3 votesBase Damage down to 2% of target's maximum health in true damage from 3% Bonus AD Ratio changed to 4% from [2.8% - 4.5% based on level]
how is it not a nerf to AD Fiora? If you are going to cripple the passive's effectiveness in late game that much, why should players invest in it, rather than a less aggressive, more tanky build?
WukongMain1 votesi saw buff and i was like LOL.
then i saw the buff and was like Oh.
Not really anything, Really.
a good fiora never ran out of mana anyway.
AscendedxBlade1 votesand normal is not she has an anti stun heals even more then the old fiora and keeps the ad ratio
Aisle1 votesWill you look to remove the base percent damage completely and make it scale with total AD?
Auz the Ripper1 votesThat would push her even farther towards a bruiser build as then it would scale with sterak's base damage increase and the ratio would need to be lowered to compensate.
Plus they seem to be reserving total AD ratios for juggernauts lately, which Fiora is not
9Howls1 votesthough she has the kit that could allow a shift to that direction
Auz the Ripper1 votesThey don't want her to be shifted in that direction The weakness of her and Yi is suppost to be "burst them down" and bruiser builds negate that completely
Billy VoHagen1 votesClassic EU post:^)
KneeGrowsFarm1 votesthat's too much nerf for my main Q_Q riot dont do this to me please i beg you............. even tho i didn't like her rework but that's just too much...
KneeGrowsFarm1 votesi really dont like tanking myself on fiora i like being offensive but i hate the fact she dies fast :(