My experiences with HvV range from terrible to great, and everything in between. I have never really noticed anything serious as far as anyone being overpowered or underpowered, except maybe Grevious being a little tough at times. Usually if I have Obi-Wan then my chances at winning are good. Sith Lords seem to be his specialty.
Obi got a decent buff but he is still a defense character. His best tactic is to tank hits until someone shows up to help him out. 1 on 1 he doesn't have the damage to deal with Sith characters. Like Boba I generally just ignore him as an annoying mosquito and focus on the glass cannons.
