Keep the game as-is. For them to make such a huge change in development at this stage of the game, we'd lose too much content or have it delayed 2 years. There are many well made games in 3D isometric that most modern games cannot live up to.
It would not be delayed for 2 years just to add in rotation....
Not that I could care much for it. Divine Divinity didn't have this feature and it was fine. It's simply that this looks similar to NWN rather than to Baldur's Gate so I thought it would have a similar camera maybe too.