Mobility is ruining the game
Too many champions with ridiculous damage potential have been given way too much mobility which makes the less mobile champions feel very underpowered, like they can't even fight back. If you're going to give a champion super high mobility, it stands to reason that their damage output should be low. That's called balance. As one goes up, the other goes down. All this mobility on strong damage dealers is making the game very miserable to play.