Fizz new passive is a nerf.
Old passive did a great job blocking AA especially vs ranged champions early. 4% damage reduction at start is a joke. You barely can get 11% very late with ability . They should increase it at least 5% flat.
9 Comments
it's dmg reduction from all sources. his old passive is only from auto's yooo do ya'll not raed the notes
Imagine getting downvoted for math.
Passive - Nimble Fighter DAMAGE REDUCTION 4/6/8/10/12/14 (levels 1/4/7/10/13/16) against basic attacks ⇒ 4 (+0.01 ability power) against all sources of damage (maximum of 50% reduction)
6 reduction at level 4; In order to make up for the flat decrease, you need (2/0.01) 200 AP. At level 4. "but it scales up!!!"
10 damage reduction at level, um, 10, is achievable through ... 600 AP.
Thats a 
Even worse at level 13 and then level 16 his passive just kind of stops existing at this point.
"but it applies to spells now!"
let's say Morgana drops her pool and Fizz is at ~70% HP. Wiki says this is a 51% damage increase. Support morgana would leave her pool at rank 1, dealing 6(+0.07 AP) damage. Assuming she has a Fiendish Codex + Frostfang + 18 AP from runes. 30 + 20 + 18 = 68 AP. Really, thats almost nothing, turning her 6 damage to... 10.76 damage, twice per second (21.52 dps). However, this number is actually increased by 51%, so its closer to 16.39 (32.8 dps).
Fizz will reduce this, at level 10 with 250 AP, by 6.5, down to 9.9 damage twice per second (18.8dps) whereas the new limit means it could still reduce it to 8.195.(16.39dps). Okay great, his passive is helping!
but thats a support morgana, what if she had completed a Luden's and was working on Seekers armguard. 
Now she also has Gathering Storm (+8 AP) and Absolute Focus (+17.3 AP at level 10) for a total of 34.3 AP from runes and 145 from items. 179 AP in total.
Also, with her max W now doing ((30 + 0.07 * 149)*1.51) 60.65 damage per half second (131.3 dps) Fizz is reducing it by 6.5 down to 54.15 (108.3 dps)
alright, thats ... something?
Is that really worth losing pretty much all of his resistance to minion damage as early as level 4?
It is a nerf, but not because of scaling.
They removed the part of his passive that allower him to ignore unit collision.