Everyone seems to think the game should pick one and stick with it. Some fans aren't happy with the Command Deck for some reason and would like a more traditional menu like KH1&2
But what about if we mix both together like this?
Attack is obvious enough, X being used to attack no matter what menu you're currently in, as it's a standalone bar that you can't 'scroll through' just like in 3D, BBS and Re:Coded (except on top, to make it look more like the traditional menu)
Then there's three menus you can scroll through with the D-Pad. The command Deck (which contains everything like in BBS/3D/Re:Coded), the summons (from KH2) and then 'Reaction chain' which isn't a menu, but a sort of mix between the Kh2 Reaction Commands and the last command in Kh1. When that flashes, scroll down and press Triangle so it activates something special like what you'd see in Kh2, but without just spamming Triangle.
They could also integrate drive forms in the Command Deck (ala drive styles from BBS) . Use only Attack commands to go into valor, only magic to go into wisdom, a mix to go into master and once in one of those 3 use light-based commands to go into Final, and dark-based to go into Anti (if Sora at least manages to control it somewhat, i guess) with whatever additions Nomura would think of.
That way, i'd have succesfully merged KH1's Action Menu, KH2's upgrade of said menu, BBS's Drive styles, and the command deck into one menu.
What would you like to see? A mix, the traditional menu, or command decks?