Have you not played any RPG games with a top down view? Divine Divinity, Beyond Divinity, or the straight action RPGs Diablo 1&2, Torchlight, etc?
I don't know if Divinity 3 will have an isometric view like those games, but it will be something similar; 'top down' could still allow an adjustable camera direction and/or distance (or even angle, to a limited degree), but no details have been mentioned (and may not have been finalized yet).
