You control the two teams, the Fireteam, and the... assualt team (Correct me if I am wrong, as I don't think that is right) directly though a cool little context sensitive command system in BiA.
apparently it's not as scripted as dod... and you can command your squad...
but to me, it still seems pretty scripted in parts, and at least the enemy AI seems pretty stupid.. commanding them looks like it could easily become a major pain in the ass...