Obsidian>Bioware
So I'm hoping the sequel serves up some goodness from a gameplay and story standpoint, if not from a technical one. I'd don't think they need to stray too far from the original. Just make sure its a good, original story and tweak the gameplay mechanics a bit.
I hate to say it Ush, but I doubt the branching paths will suit you. I'd love to be able to pick either dark or light at the beginning of the game, and have multiple story branches from there, but its just not going to happen. It'll probably be similar to the first game, except your party members will actually react to your 'alignment' this time.
One thing I have noticed about most of the games these guys have done (Fallout, Planescape, Baldurs Gate, etc.) is that they really like to give the user a lot of choices and make those choices affect the outcome of the game. Bioware is much more linear in their game making.
I still have high hopes for this game, if only because of Obsidian.