A lot of hostility in this thread. Anyway, OP has kind of stumbled into something that is a real issue and that is the disparity in recovery between defensive powersets. Some sets get a large recovery boost, an AoE end drain, or both while some sets get zilch. And there seems to be no rhyme or reason to it. It certainly has no discernable balance motivation, because the sets that get endurance management abilities don't consume more endurance than the other sets.
I say normalize recovery across the sets like they did with Blasters. Hell, it may have been something they were planning to do and just never got the chance before the game was cancelled.