The chances of success which are percentage based are not - random.
It doesn't matter what you call it. The fact remains: if the CC is chance based, you can't know the outcome of the action you take. It can fail, or it can succeed, which then has a massive impact on the rest of the fight. The only way it becomes acceptable is if the impact is diminished (and the only way to accomplish that is by prolonging the fights or making CC weak enough not to matter).
Countered by party positioning, at least partially. Maybe a new talent that allows you to get freed from CC once during a fight?
It can be countered by positioning, but that tips the balance in favor of all ranged parties (or 3 ranged, 1 melee), but I guess that applies to AoE damage as well. CC is just more punishing.
For recovering from CC - I guess it wouldn't be impossible to make it so you still get your turn while CCed, but can only use certain skills. But there are options already, it's just too easy to break through whatever armor was recovered.
