My biggest problem with Jim McElwain is that he would be a one and done at CMU. I could rationalize the ethics of it, "it's a business, you have to take the opportunity to go to a bigger, better program when it presents itself, etc.", but from my limited data base it seems the majority of those coaches flame out at the bigger, better program. Taggart to FSU and Kiffin to USC both crashed at their dream jobs. Graham bailed on Pitt and did OK at ASU, but eventually was fired too.
I think taking McElwain would be too big of a risk.All the candidates come with risk, but I would prefer to take that risk with EB, Sark or Leonhard.