transfers.
Have you seen the creditials of the new dean of the Marriott School? Do you think with her background and her level of academic achievement she would be interested in accepting students who are a negative pull on the averages in her school? That's not her job, nor do I think she would have taken that job if it was.
If BYU was to do that they would never be able to recruit the level of academic talent they just brought into the B-school. Last I checked, BYU is still an academic institution.