I can see both sides of the Jabbawockeez. They don't exactly scream, "Halloween", aside from perhaps their masks.
But do consider this: they do have their own full show in Vegas, and tickets are in the $50 range. And for HHN, they are included in the price of the ticket.... that's a pretty big bargin, even accounting for an abridged show. Plus, they are locals, so you have a hometown crowd. From a management/stage production/tech point of view, their show is probably much simpler to put on than B&T. And the shows did seem to be filled, and most people I talked to (and note they were more GP than enthusiasts) really seemed to like them.
I can totally see how it's justified to bring them back.
Personally, I saw the show twice last year. I did like it, but not love it. My main complaint is that I wished it did have more of a Halloween theme, but there does seem to be some word that may be the case this year. But they are a very professional group, and excellent dancers.
As much as I've wanted to like B&T, I concede I only enjoyed it for the eye candy. The scripts have always been "meh" at best, and in that sense, I don't miss them at all. The hype never really lived up to the reality. I also feel the same way about The Hanging at Knott's... never really understood that love either. An isolated joke here or there was good, but as a whole, it usually is pretty weak if you ask me.