Changes that should happen in the mid lane

I am a mid main, and I enjoy playing this game. I feel like Dianna and/or fizz need some nerfs. Fizz just have too much burst damage and his tidal trickster is pretty annoying. He has too much mobility and yet does a pretty insane amount of burst damage. I feel like the nerfs to akali were stupid. she was a good mid laner but wasn't even dominating like Dianna was. speaking of Dianna, she has way too much stuff in her kit. she has a shield that also does damage. a range attack that can poke the shit out of you and a dash where if she is close to you, it's a guarantee ult. it's just her ult are game changers because if you have the upper hand, she can just ult and do a ton of damage while completely cripple you in the mid lane. Dianna and fizz just have too much damage in their kit and they all have that one ability that promotes damage while making them agile. like zed and talon( I don't main them btw), they have agility, a range ability, a ability to engage. the reason why they are solid picks but not crazy picks is because they agility ability does not do damage, and what ever helps them to stay in lane( like zed's w or talon's E) does not do damage, these points also applies to alkali. I get why they nerf her ult's target but other than that, it was unreasonable, Dianna's shield is what helps her to sustain in lane because she is squishy but why does it have to do damage. and I think her ult can do the same damage but doesn't have to parts to it where it disable you or that it stays the same with just a little damage reduction. Also I think fizz's tidal trickster should do less damage, or maybe his tidal trickster shouldn't avoid turret aggro or at least shouldn't reset it. that's my rant. I hope people who main these champs don't get offended, it's just I think they should at least be somewhat on our level. I don't think all of these request are going to be met but these are just some of my ideas.