I think Mario would recruit more than fine at UM, even better than Oregon after a couple of good seasons, the offensive philosophy is what worries me the most.
But, as
@DMoney said if Mario (or Stoops) comes it means that he received the proper resources and a totally different commitment from the administration which is a VERY good sign.
Having said that, I don't think we could endure a "slow build" and, even if I'd be glad to have Mario or Stoops, I'd rather have an established offensive guru.
Let's put it this way, for me: Kiffin/Freeze*>Mario/Stoops>Herman>every hot G5 candidate
*I know that UM won't ever entertain the idea of bringing Freeze, but a man can dream.