That would honestly work (the tabletop version does use a Move/Minor/Standard model.) I do think that since this franchise was a video game first and foremost, it could take advantage of an AP resource model to better balance its spells and martial powers. And DAI in particular uses a energy barrier/physical barrier system that is very similar to Divinity.
I've given up all hope of the base combat being any good, or worth (at least for me) turning up past story difficulty to get through as quickly as possible for the character stuff.