Suggestion: Make Turrets do % Maximum Health Damage
People don't like % Health damages, from what I've read on the forums. But turrets seem to be an issue, yeah? Well what if they did % Max Health as damage?
If this was the case, the tanks couldn't faceplant you under turret - and ADCs equally would not have to be totally concerned with being fried by the turrets any quicker.
Any skills that reduce overall damage (ex: Ali ult) would still apply, so turret diving wouldn't be totally removed.