I think they mostly had the best of both worlds last year, but the real craziness only occurred in the last section with Lang and co. If they had the space and time to have two sets (one interview style, one roundtableish), it could be really great.
Given that Jeff said that they were taking the couch from UPF to E3, I guess they are going with the same format again.
EDIT: The downside to the 'large crew of guests' format is that some guests talk less and get sidelined due to dominant characters. With last year's format, it's much less of an issue.