I'd rather they look over the balance first instead of having 'pretend personality' which frankly, doesn't seem to add much to the game IMO.
I've had friends complaining about it and the whole 'arguing with yourself' experience is pretty ill-fitting for a single player game.
'But imo they should hire a few additional authors for an expansion.'
I rather they just save the money and pit the players in a fresh combat scenario with a fresh party. Have a better combat designer to balance the whole skill sets and refine the AI.
Please, don't carry over the old over-powered party - it's not even gonna be a challenge.