As I do understand that 8 seconds is kinda BS to be out of it. Everyone has 1 Stun Release. Yes, it sucks if it is on timer but there has to be some kind of caution or people would just pop it all the time. I kind like having to make the choice.. Do I use it now or eat this stun?
So if all Stuns/Mezz were 60% Resolve and all others were 40%, with your Release, you can get stunned, Release... Then Stunned again and force to eat it but any stun after that should be blocked. I do not think that is unreasonable. If you popped your Stun off before because you just HAD to get that guy before he got away, well themz the breaks.
If some one Roots you just because they are spamming crap, a Stun+Root would give you a fast immunity. If you die to one stun, chances are you would have died anyway.
Added Note: Any one see any reason why a CC Release should not add a 2 second immunity after? How many times do you get Stunned, release and immediately stunned again? RAGE!!!