CC is way out of controll
I have a solution to make cc less of an "cancer thing" and more about a "i can't do nothing in this time"thing. Just give melee and ranged champions a "grace period" where after u get stun for the next 1-2 sec all the stuns will only be 0.5 sec long. Because right now the only thing that wins teamfights are:mages and cc This change will make mages and cc more tolerable cuz there is no counterplay when u get :polymorphed then rooted then stuned then got knocked up and by the time all of the cc is done u didn't even use a single ability.
you can also get Legend: Tenacity in the precision tree. I do this when playing as a melee champ. It stacks nicely with Merc boots. There's also unflinching talent in resolve.