Do not Buff Towers
Nerf the champions or the new runes. It is as simple as that. Remove the free Attack speed in the game and half the small dmg runes from sorc and dom. Remove demolish. Remove ap tower autos from mages. Decrease the mobility in the game or just remove backdooring/splitting. Riot you need to do something about this. If you buff towers it will just make the champs who cant get tower useless. It is a cold hard fact that tower protection and map presence win you games.