I wish Riot cared as much about assassin balance as they do about tank balance
Let's make sure Galio's entire kit can be dodged, make his ult not fully global and give him limitations on how he can use it. And let's make sure Rammus is slowed when he has his 'w' up, and let's make sure Shen's ult can be interrupted and he eats the full cooldown when this happens. And let's make sure Tahm Kench needs 3 stacks to devour an enemy and is slowed while he has them in his mouth. Oh and let's make sure these champions have REALLY high mana costs and cooldowns. But champions like Fizz and Zed having any sort of counterplay whatsoever is completely out of the question.