Twisted Treeline game balance idea

Hi, I would like to share my game balance idea. I couldn't help noticing that cc oriented teams are just way too OP in this game mode. When you play against hard cc team you are completly screwed, since there is not draft mode at this game mode you have no way to counter such team. (Let's say fiddle, leona and jax).

So my idea is: -global tenancity aura around 10-20%.