The only reason it's a thing to begin with is because Pruitt has been awful this year, and Leach is the proverbial "could have been."
I like Leach, but I've always personally thought he's overrated. This sounds really disrespectful to the programs where he's been, but he's never coached at a place where football is a really big deal. He fields solid, not outstanding, but solid teams at places where they don't necessarily demand or expect it. There's something to be said for that, but there's also this notion that he could come to a big time program (like Tennessee) and would be guaranteed to light it up. I've just never bought into that. His teams also never play defense, and he's never played in a super deep conference either.