Last nerfs i remember is that Riot made its damage stronger for one target but less for multiple targets. If Riot can do something about it, i would fight that fiora any day than the one we have right now.
If she is nothing without her ult, then Riot needs to balance that out. Giving free true damage, heals, aoe heals, attack speed reduction and so much more to balance out a toxic ult just seems stupid.
Before, her passive was jack shit. I agree with that. Her Q was okay and atleast you can stick on to a target for a little while. Her Riposte was balanced. Period. Her Ult is what made Old FIora Old Fiora.
Now we have a very strong passive, which is neat but bs at the same time. This filled up the gaps of her old X per 5 sustain and the damage from her old Ripoiste
Her Q is a free escape. It sucks tho, but atleast the cd is high if she manages to hit nothing. But if she is fighitng you and she lands a Q, her rapier is gonna be shoved down until you are dead (assuming it's just you and her).
Her Riposte is heavily filled with bs. She deals damage. Stuns if she was gonna get stunned, attack speed reduction, slow, and takes no damage at all. Before it was just one basic attack. For Riot to balance out this riposte, she doesn't gain any AD. 40 to 50 AD (im not too sure on the exact numbers) vs all of these things above. The AD is replaced with her % health true damage so consider that extra. I would love that Fiora could just riposte one ability, but I think she got the Award of #LC$BIGPLAY$ and is in the Hall of Fame with
and 
Her E is fine. Its just something she took from Darius same for her Riposte. Her E before was pretty strong. THats what actually made her the Grand Duelist. Burst of attack speed. Now we have auto attack reset with a stronger 2nd hit, which is basically a free crit at lv 5. A good trade off compared to the other abilities.
Ult is pretty ridiculous. Can only be countered through
and
. Old Ult, you gotta take the damage. Trade off is that she gets a butt load amount of heal before and deals a lot of AoE damage, Now she gives AoE Heal. AoE heal is far worse than AoE damage because you can exhaust that damage. You cant exhaust true damage and you have
's ult on crack
On paper, anyone would say that Riot overtuned her. Does she need more nerfs? I don't think so right now. We will just have to wait, but she is my top ban for bs.
I might've missed some "vital" information, but this is what I see right now compared to old fiora and the current one.