You do realize the first 2 Divinity games were isometric view? And the third person view does limit the world interaction compared to the interface of an isometric view?
While I don't have a strong preference between real time combat and turn based (either can be done well or poorly), some people have declared D:OS an instant buy because it will have turn based combat. That should allow more strategic fights, and FWIW, there will not be as many opponents in D:OS as previous Divinity games.
Welcome to the forum.
