On one level I would too. But, on the other hand we need Sessions in the Senate.
As VP Sessions would preside over the Senate and even be the tiebreaker if needed.
As provided in Article I, Section 3, Clause 4 of the United States Constitution: The Vice President of the United States shall be President of the Senate, but shall have no Vote, unless they be equally divided.
Senator Sessions would be much more important to the Senate as the Vice President.
as vice presidet the VP whoever he is would be a team player.His vote would be no different than anyone else Trump chooses. He has been a real leader in the Senate and should remain there I do not think he can be replaced.