Yes it uses 5th Edition D&D that is pretty much the only hard fact we have about the gameplay at the moment. The good thing is that there are currently at least 4 larger DND RPG in development so even if BH3 won't make everyone happy there are others. Though BG3 is the only one of those made by a studio with over 20 years of experience and a non-indie budget. BG3 will most likely be the one where people with no previous DnD experience will still be able to learn the system without being overwhelmed.
4 DND RPG,wow..So buddy, could you tell me which 4 games??? Thx