The lack of responsiveness on OGCD abilities really shows when I can pop recuperate, then have the heal go off after I'm already dead or hit Purify the moment I get CC'd but still die before I have a chance to do anything due to it taking close to a second to actually go off.

I think they ought to at least make the CC immunity on the latter be baked into it by default and not require you to actually dispel an effect because the server ticks are so slow that you often can get stunned/bound/whatever again before it even has a chance to kick in.