Still, I want some opinions about how much of a punishment freezing the cooldowns is REALLY. If you're playing Rogue doesn't most of your damage come from regular attacks anyway? The way I see invis, there is this HUGE advantage that no one seems to really value which is the ability to REPOSITION. This is a HUGE advantage in my opinion. Also, people would actually have to think about the best time to use invis in relation to their other cooldowns.
It punishes playing in a regular manner, not just so-called exploiting. That is all it takes to be a bad idea to implement.