No White-Murray is criminal. No way around it. Your best players have to share the court, especially down the stretch. If Nurse can start and close with Lowry (6-0) and FVV (5-10) in their backcourt, there's absolutely no reason that Pop can't do the same with his 6-4 and 6-5 PGs.
Just Pop going against conventional wisdom to show his "genius". Pretty sure his refusal to challenge a single play thus far also has to do with the same thing. Challenges are beneath a "genius" like him.
It really might be time for some new blood on the bench. Pop can move over to a Pat Riley type role.