Obviously relying on highly touted classes comes with the implicit understanding that coaching is more or less equal. The schools you name all lost coaches due to underperforming in their coaching responsibilities to good athletes.
I don't deny that the evidence shows Dantonio can string together successful seasons (8-9 wins) the way he develops and scouts talent. My point of contention is whether he can continue to do what he's done in 2010 and 2011 (10-11 wins) with the same type of recruits season after season. My answer would be probably not, because just like with 4/5* athletes, some 2/3*'s that Dantonio recruits won't turn into Cousins or Jones. They'll play to how they were scouted by other coaches, and that leaves a hole. Doesn't mean Michigan will exploit it, but between us, Nebraska, OSU or PSU that will be exploited in most years.
The reason Peterson and Patterson are such hot tickets in the coaching world lies in the fact that very, very few people can get "out recruited" and still field elite level teams on a regular basis. Maybe Dantonio can, but the odds seem small.