I play both Warlock & Hunter, & I have to day I disagree with you. Arc Blade is definitely annoying when you don't see it coming but it's one of the few supers I can stop on my own. You have to be quick & accurate, & stop expecting not to die every time you come across one. I don't like using Arc Blade personally because I take so much damage just trying to get kills. I've never cleared the whole team before but I've seen it done. That being said, every super has its pro's & con's but I don't think any are OP. It's honestly more annoying to get FOH or Nova Bombed when you're the only person in the area. They're panic supers. Hunters supers definitely take more skill to get used to, & people complain they're OP because they're so PvP based.