Season 6 in summary:

ADC rework, buffing the crap out of the class most effective at destroying towers.

Tower HP and damage reduced to the point where they pretty much don't matter beyond level 3.

Death timers extended, giving teams more opportunity to push towers.

And coming soon: almost all of the good mana regen items removed, forcing AP casters to recall much more frequently (because don't forget, mana potions were removed too), leaving their towers undefended.

And nobody from Riot is saying a damn thing.