After entering the Dyson sphere the Enterprise was forced directly towards the sun of the system and could barely escape flying directly into it with the crew coming to the conclusion that they could survive for maybe three hours and couldn't escape.
But when Scotty and Geordi opened the gate to the sphere again, the Enterprise could suddenly maneuver again and fly towards the gate with no problems. How did they get maneuverability back so suddenly?
At that point Scotty concluded that his ship holding the gate open would be in the Enterprise's way and would have to be destroyed for the Enterprise to get through. Why did nobody consider simply flying a bit below or above Scotty's ship?
Compare the Enterprise's size here to the picture posted below. It would have fit through the gate above or below Scotty's ship easily.