I was all-in on Trev. I thought that chair was filled for at least another decade. He's a great communicator and more importantly, a thoughtful and authoritative leader. You can't let the tail wag the dog and that's what dudes like Eichorst and Moos allowed. With Trev, there was never a doubt who's in charge.
He also has a plus-sized ego, which is probably the norm for ex-Butkus award winners. I don't think he ran away from anything. Every major program is fraught with politics and instability (especially places like A&M). Dude's with big egos are almost always looking to the next big thing. Trev wanted to fry bigger fish. I think it's that simple.