Butch Davis is well aware that the biggest mistake of his career was leaving Miami before the big payoff. Larry Coker reaped the benefit of what Butch did. 2016 and then 2017 should be the big payoff for what Fedora has done at UNC. He would be nuts to leave before at least 2016 plays out.
The same goes for Chizik.
That said, if Fedora were to leave after this season, I would assume that Chizik would want the UNC HC job and would get it. As long as he could keep Littrell as OC or get another OC who is top of the line, Chizik should be able to win big in 2016.
And once we get back to winning the ACC, the job becomes a much bigger one.