AT times I can defintely be a fanboy about games I enjoy. I'll also be the first to criticize the faults coh or any game has, but in a clear and constructive manner instead of insults and hyperbole.
I've played a great many mmo's, starting back in november '97 with UO. XP debt isn't the worst by any measure, it's a great deal better than acutally losing progress and possibly even levels. It also promotes people playing a little more carefully, I see people who are level 60 in wow who don't know the half of what their class can do or what their abilities are, but they just got there from grinding it. People in games with debt or xp loss tend to learn how to play a little along the way, or give up.
CoV is an interesting game/expansion, but I do have some complaints so far. I think the main one being that prestige is too hard to get, especially for a small "guild" The idea of bases and base raiding is built around being able to field 16-32 people at a time it seems like, for raiding and defending(and the trial to get the Item of Power that is what people raid for) This basically limits small guilds quite a bit and removes a bunch of content from their plates. Most of the other problems I have with Villains would be issues with Heroes carried over, since it's similar gameplay, and I think most people know the limitations of that game.
The game/expansion does add a lot at least, and should keep people occupied/interested at least for a couple months of playing around. I just hope they do tweak some of the issues with bases and small guilds, but I guess you can't please everyone all of the time.