How is it an exploit. The whole purpose of the ability is to drop out of combat and escape. It should allow you to do anything you can do out of combat. And again you people with your parsers. If the boss goes down then what does it matter. If the boss fight is coming down to missing 300 DPS then either your not geared enough or the game needs adjustment. My guild uses 2 shadows, both inf spec, gunslinger, and commando dps in our raids and we have yet to run into a problem that wasn't solved by better player focus.
You're kinda contradicting yourself there. Without the parser, how will you know you're missing 300 DPS?
Also, how would you know who's missing the 300 DPS?