I think that even if they were to go independent, the magic and the IP are gone for Bioware at this point. A lot of the original veterans have all been laid off already by EA over the years, they've moved on, and while they could create spiritual successors to the IP, they're locked away now and it really wouldn't be the same if that's what fans were looking for.
I think it would be more like a Turtle Rock Studio type of situation if they were to come back at this point.