Well as hard as I've tried to search for reliable information on this game, gotten absolutely nothing, except for the odd comment stating it nothing more than a publicity grab by PC Gamer...
So lets assume that the game is using the Dragon Age engine, which btw is a very nice looking engine. Then I'd want BG3 to be able to retain the party element from the previous games. Dragon Age is strictly a one-player affair and I'd hate to see that element transferred over to BG3.
EDIT - Dragon Age IS a party based game, so I'm happy on that point.
Oh God, I hope they don't dumb this game down, I can't stand the current crop of RPG's currently being sold...
