Lol Hardly,
Eve is actually the exact opposite, high elo Evelynn players know how to use her stealth to a terrifying degree, where as lower elo players don't take enough of an advantage from it.
Fizz was crazy powerful, and I hardly think this will dumpster him. He is likely just fine after these changes. Lucky for everyone we patch regularly so if we over shoot it we can adjust him in a future patch.
Diana is SLIGHTLY underpreforming in the jungle (part of this might even be Fizz eating her winrate, so Fizz nerfs are also a Diana buff). And we are trying out some lightly Diana jungle buffs to touch her up.
Gragas is another one not mentioned, but doing just fine and brings a lot of utility to the table.
Don't forget Nunu is on his way as another tank/AP jungler next month.