Hi tubby linton,
I wonder what the bus would have done if he had used a handful of nose up trim to get the nose up?
In Normal or ALT Law, the elevator position is controlled by the FBW computers. I think if Sully had added stabiliser trim, then the elevators would have moved in the opposite sense in order to maintain the same Alpha.
You'd have to apply a lot of nose up trim to before you ran out of elevator authority.