He's not. It's a gimmicky, system-based offense that takes years to get the right personnel in to perfect. For reference, Wake went 3-9, 3-9 and 7-6 before finally winning 8 games in Clawson's 4th year. Oh, and they've won double digit games exactly once in the 9 years he's been there. Mario needs to win immediately.
The 'insiders' like Caneville et al are a pathetic microcosm of the fanbase. Zero juice and 100% speculation based on aggregating hot topics on messages boards like this one. It's the same mouthbreathers that swore up and down that Mario was hiring Ponce as OC when he ended up coming on as QB coach. It's the same imbeciles like MackBammer that are so sure that Arroyo is replacing Gattis.
Oh and Coley? This isn't 2014 and Al Golden isn't our HC. As WR coach? Sure, why not, but Mario would be better off running it back with Gattis if he was going to make Coley his play caller. Also, LOL at the idea of Kevin Beard coming back as WR coach. Guy isn't even on field at Toledo but he 'played for Miami bro'. Get Hank out of the NFL if you want a former Miami receiver so bad.