Just because some mechanics are the same doesn't make it DOS 3. They were pretty clear that they were going to be using the Divinity engine, expecting completely different mechanics seems unrealistic. The story/world are unique compared to DOS II.
My point was mainly addressing you saying that Larian know what sells and and are trying to make money in a competitive market (that last point could be made regarding just about every business). I was being somewhat sarcastic when suggesting they make DOS:3 instead but truthfully it doesn't feel like a BG game to me, that's just how I have found it to be. I lost myself in the previous games, whereas BG3 just left me feeling disappointed. It's not just about the mechanics, it's a whole swathe of things that I really can't be bothered to list yet again.
Fair enough, I never played BG1 and BG2 so have no opinion on how BG3 compares to them. I misunderstood your point. As far as why they didn't go DOS III (who's to say they won't at some point) I think they wanted entry into D&D in the hopes of expanding their reach. There are also more opportunities to produce additional D&D content by tapping into its wealth of lore compared to DOS II.
