The situation at OU is a completely different animal. Lincoln Riley was OC last year. This year, he still calls the plays. The DC is the same from last year to this year. Nothing down there has changed other than Bob not being at practice. While Lincoln Riley has less credentials, OU didn't have to worry about him hiring his own staff. It was already provided to him.
I'm all for hiring Frost, but I don't think using Lincoln Riley and OU is a very good example. Frost would be walking into almost the exact opposite situation as to what Lincoln Riley did.