It's interesting that you're confident of which account it is; I didn't say. I had another PM from another user, naming the same account (and giving reasons for suspicion which were completely different from mine). So: yeah, putting this all together, either it's him again or there are a whole bunch of similarities sufficient to ring alarm bells independently for multiple different users.

I don't see any need for anyone to swing the banhammer again unless he starts being large-scale abusive again, in which case no doubt he'll get re-clobbered. Perhaps by then someone will have figured out how to get his votes undone. (In cases where someone's been banned for voting abuses, come back, and done the same things again, I would be in favour of simply zeroing out all votes by the revenant account.)