Fizz shouldn't be snowballing early barring a few lanes. Those lanes aren't very meta.
He CAN'T snowball vs ekko, syndra, vlad, orianna, zed, talon, akali, malzahar, katarina, kassadin
He CAN snowball off Taliyah, xerath, brand, twisted fate, aurelion sol, vel'koz, Karthus, Kayle.
There are post 6 skill matchups that you lose early but can win post 6. Those include yasuo, annie, Zilean.
Tell me, which list do you think holds the more common picks?
He already got the assassin treatment everyone was upset about. His ult takes a long time to go off and its a skillshot (hello support peel, shields, zhonyas, exhaust)
His W has to stack up. If you miss ult, it takes a bit.
His E is is escape and biggest hitter.
His damage is very delayed. IDK I'm a fizz main sure I'm probably just really bad I guess. But most midlane matchups I'm under my turret trying to dodge abilities and farm while getting bullied all game unless I get a lead or a kill somewhere. Post 6 teamfights can be hell too. I survive off watching the map and trying to make plays, which Fizz is good at admittedly. It's also hard to shove your lane unless you get ahead. Often times I'm begging for a jungle gank and by the time they come, I can't engage because I'm poked down too low vs lots of meta matchups.
What this SHOULD do is allow fizz to trade a little more and survive a little better in the rough early laning. And it is indeed rough.