I don't know that BYU left to join the Big 12. I think that was the hope, but I've always thought that the decision to leave was independent, and that once it became clear that the Big 12 wasn't an option, BYU is STILL better off outside of the MWC. True, we aren't Notre Dame, but BYU isn't Wyoming or New Mexico either.
This topic has NEVER been discussed on here... 🙂