'Chise … I do have some good insight into the Mario situation, going back a lot of years.
On this one, I will say that Mario took some unfair hits on his decision to join Saban's staff. He did have Golden's endorsement to do so, and looking back, it was the right career move for him. The circumstances were almost identical to Mike Barrow's decision to join Pete Carroll. Worked out well for Mike, and yes, people were also miffed to see him leave, but there are no hard feelings from what I can see.
As for Mario, he would love to be back as HC at UM, as that's the only job he really craves. His contract actually has a rider that restructures his buyout if he takes the UM job. Absolutely, we can debate whether he would be the right hire, that's always up for discussion. (Personally, I think he could be great for the 'Canes, but that's just my opinion). You may think otherwise, and that's ok. But I can tell you, his love for UM and his desire to be it's HC some day is unquestioned.