Let's make turrets mad!
Maybe this is because of me coming from another game, but I honestly believe turrets should be much more dangerous than they currently are. Turret dives should be excessively dangerous to do, imo. Turrets are your safe zone, to an extent. But it shouldn't be a trap zone once level 6 hits (Lee Sin, prime example). Turret dives are not too hard to do once a tank shows up to eat the damage. Early-Mid game tank build is perfect for getting a turret dive going.
Turrets shouldn't 1-shot, of course, but they should be scary. Perhaps, against champions, they should start doing 25% of its targets health in physical damage? This way, early game turret dives have to be more planned out, especially if there's no tanks (hello, early game, mid game metas).
Reason for this idea is because turret dives are not only anti-fun, but can literally make a game excessively unpleasant to be in. A player on the defense shouldn't be punished for being defensive by a turret dive for 100% of your health to the grave, especially as a bruiser/tank. This, of course, puts more focus on hitting the turret rather than the player.
This idea keeps players in the game rather than looking at a grey screen while keeping focus on the objective. I know this idea may sound strange, but it's an idea coming from another game I truly liked.
is OP, truth be told. Its also toxic.