So any LDS player at Stanford, Oregon, USC, Cal, Texas...you get my point. That's a large list. Not all of them said no to BYU due to P5, but I think an argument could be made that a significant portion did. You pull from that list and there are some very good players available.
If BYU gets into big12 look for recruiting to improve noticeably. Not just for LDS kids who are looking for a P5 school, but for good christian kids who are looking for a clean environment. There are some good opportunities for these types of kids if BYU is in the big12. But we're just not quite attractive enough at the moment...