Hmmm...
This might be interesting. I'd like a hybrid between the traditional battle system, and one that is quite fluid, without the random encounters. I want a system which switches from character to character once they've made their move, much like old Final Fantasies.
Gambits were optional, but you were almost forced to use them, and make all characters the same in terms of abilities. Not cool. I'd rather that the gambits system was removed altogether. And definitely nothing like the license board, heck no. It just spoils it when you can give all your characters flare just like that.

Also, enemies should spawn more frequently, if there are no random encounters. I liked the surprise.
So, if Square gets the priorities right, this *might* be great. If it's just XII, gambits, and boring combat all over again, I will be very disappointed. I didn't like the very fast battle pace. It cut the game time, and took the thrill out of combat. How can you enjoy kicking a monster's arse if it's so quick and indirect?