Yes, I think the theft of Peter's powers is mostly a good thing. Of course, Arthur Petrelli is going to have some pretty stupid moments, since he's got all those powers, but I still think it's better that they belong to a villain—assuming he is—than a "hero". That being said, the recurring "are they heroes or villains?" thing is getting pretty tired. Most of the time it feels like the show is just repeating itself.