I think I would prefer this approach; or maybe something along the lines of Dragon Age Oranges. I think toggling on/off is certainly a practical concept and it would probably help people like me: whatever else I might be able to do, I'm really no sort of tactician.
Whatever Dragon Age Oranges is, I want to play it. Sorry, couldn't resist...please don't ban me!
Can't see the harm in including an AI function but prefer full control myself in games of this ilk.