being on the same footing with BYU and thus BYU would beat them in every way: Reputationally, Financially, with Marketing, Recruiting, History, and ultimately...on the field. BYU would dominate. He had to to everything possible to keep that from happening. Thus, stay to the last minute...until it was painfully obvious the only option was to go to the XII or die with OSU and WSU in the Pac2 (or 3 with the yewts).
So, MH realized he had to do everything possible to keep the Pac12 alive or he would lose everything they had gained over the last decade.
Too Bad...he lost. And his vision of BYU dominating is coming true.