There is a clear issue with the CC combo that kills you from 100 to 0 . Some classes have rotations that can spam CC hits with almost no cooldown or they have too much damage and kill ya after they landed a CC instantaneous. You get to a point where you look at your character getting killed without a chance to even press a skill . Having a window where you can respond or at least get the feeling that you TRIED will make a huge impact to the health of the game. I suggest having E changed so that it gets us out of any CC not just Q ability. This way the classes won't get changed so much but you at least have 2 chances to get a comeback. It will be less frustrating and feel more balanced.
Don't ignore all those reviews and complains about how broken the game feels because it is the first thing any new player will feel and chances are they quit .
here are 2 examples : https://www.youtube.com/watch?v=XX_tfRQ-1sM&feature=youtu.be