They didn't burn couches because he failed at Tennessee. He went to USC to coach at his dream school. He went there before the major NCAA penalties hit. Then, could only recruit 15 players a year, and had a multi-year bowl ban (off the top of my head, that is how I remember it, at least). Still, he managed to recruit more 5 star players than UGA or Alabama do, in their best years. Sure, the results on the field were mediocre, but it is hard to blame him for that, given the restrictions. I think most people get that all wrong. Then, he succeeded at Florida Atlantic and now, is succeeding at Ole Miss. Oh, did I mention his success at Alabama, as OC?
The man can coach, and I think he has learned a lesson or two, over the years. Sure, he hasn't accomplished all that some coaches have, but I believe (as do many others) that the potential is there, in a big way.
It is hard to know what Heupel's ceiling is, but I believe Kiffin's ceiling is as high as it gets. Of course, there is some risk, but lower risk usually means lower reward. I'm not going to be satisfied with 8 or 9 win seasons. I want championships.