Kris gets higher points per minute than PMac because he is playing more minutes with Keegan on the bench than PMac is, and thus his opportunities to score are much higher.
That being said, all the advanced metrics indicate that Kris is playing better than PMac overall.
I support Kris coming off the bench, however, as our rotations are MUCH better doing it this way than if he started. I do think his overall minutes could go up, but in terms of just starting I think the debate is kind of dumb. The team is better with him coming off the bench......just get him 3-5 more minutes per game though