Trump will still ad lib a little or a lot from the teleprompter but his advisers are going to keep him on it at least until he can get through the next few weeks without any major flubs.
He'll keep himself on it. Eye on the brass ring. He has a feedback loop - the polls. His adviser are telling him how they think he can improve his standing there. He will try it. If it works, he will stick to it. He is capable of self discipline! Has to be, who is going to kick his butt if he screws up? The voters!!