Fizz Nerf Suggestion
To start off, a large portion of the community agrees Fizz is one of, if not the, most unhealthy champions in the game to fight against. I took some time to think about how to nerf Fizz without killing Fizz so Riot might actually try it, and came up with a very simple but effective thing.
The Change : Replace the untargetable function on Playful/Trickster with full CC immunity (someone else also suggested giving a little damage reduction during the CC immunity also which honestly I'd be fine with some as long as it's not a lot, he'd still be taking damage).
Why change just that? Well for starters it doesn't make sense how he becomes untargetable for standing on a stick, just kick it over and laugh as he falls on his face. Anyways back to topic, by replacing his untargetable state with full CC immunity, it creates counterplay against Fizz and removes one of the single most annoying and toxic inducing things in the game. When you're fighting a Fizz right now, he is 1 auto attack from the weakest AA champion in the game away from dying, jumps onto his stick, prevents you from being able to damage him, lands on your face, then Urchin Strikes through you killing you because you couldn't touch him while on his stick. Does this remove a lot of his outplay potential? Sure, Fizz right now can dodge Karthus' Ult (again don't know how because all he is doing is standing on a stick), Zed's ult, and even tower shots when he dives. By removing his untargetable state he can no longer dodge things like that. At the same time he won't lose any mobility or damage because he will still have full CC immunity just like he technically does during Playful/Trickster already, it will just make it so Fizz has to actually play smart when he goes to dive/solo champions because he loses the ability to just dodge every possible thing in the game. This in turn will also raise the skill cap for Fizz just a little bit due to forcing you to play smart instead of jumping in, killing, jumping out with little to no penalty (aka dying to a tower shot).
This is just a thought of something that could be done to Fizz to make him more fair to play against and less safe to play as making his interactions more interesting and healthy for the game. To reiterate the change, this replaces his untargetable state giving him full CC immunity instead. It is not lowering his damage or his mobility in the slightest due to being CC immune still.