2 changes that will make URF way better and get rid of most problems.

Invisibility has half the duration it normally has. Consecutive cc gives you tenecity. The first explains itself but the other is so you can't be perma rooted by a morg and lux. Here's my idea: First cc is the normal amount of tenecity. If cc'd again within 2 seconds your tenecity is increased by 30% and it keeps going up