After watching the trailer for a few times, I don't mind the kaiju fights as well. Looks like the Dpad is used to assign different moves of the kaijus. Personally I think it is a pretty good addition to the game, as you have said, they really need to create something new for the sequel rather than revising the same formula.It looks cool, although didn't really show a whole lot, I don't care about the big kaiju combat lol, those extra stuff from Bayo games are always just kind of glorified cutscenes and more spectacle than something I actually care about, but as long as the core gameplay is fun, I'm in.
I still haven't finished Bayo 2 on non stop climax, I do like the two Bayo games, but I think the two are kind of "samey" especially if you already played the hell out of one of them.