Not what I was hoping for. I realize co-op is the salted caramel of gaming, but I'm not a fan.
I don't think the co-op in this will play out like Diablo 3 style, if that's you're concern. Baldurs Gate, BG2 and Neverwinter Nights all had 4-player co-op, but they also had a decent character party system for those who wanted to experience it's campaign in SP. I would expect this would be similar, since it's also from Bioware.