I'd like to see a return to the original KH design, an appropriate sentiment on this board, I suppose. But that's not gonna happen, so it doesn't matter to me what next wacky contrivance Disney or SE tries to wedge into the "next" series entry.
BTW, series-wide questions are best for the Square RPG board, though they axed most of the RP content ages ago.
Too many Final Fantasy fans for ya? The hot spot for this sort of query has over the years migrated to the "latest" game's board. Right now, several such series-speculations topics on the ReMix 1.5 board.