The issue is whether "have a break free or mez first" is really enough options to be considered "adapting". Blasters, at least, also retain use of their 1st 2 powers, even while mezzed, so it's not as big of a deal for them. I'm not saying enemies shouldn't have mez powers too, but perhaps them being able to mez players indefintiely shouldn't be allowed. IMO, NPC mez powers should be severe but short-lived, (like no more than 1-5 seconds), and their powers should have recharges far in excess of that duration. I agree that the difficulty could be tweaked, but perhaps debuffs, instead of hard controls, are the answer...