I'll repeat what I posted earlier:
"That said, the D is built primarily to rush the passer, force quick three and outs, force turnovers, and play from ahead. They're not really built to defend smash mouth Tressel ball for an entire game because the offense is expected to both possess the ball with power spread running and score enough to force the other team to throw. We've known that you sacrifice some stoutness against the run with that approach unless you have extraordinary DTs, and that's the one area of recruiting that hasn't quite been there. So. I blame the coaches some, but still give the lion's share of the blame to the offensive staff and players."
To elaborate a bit further, we wanted, and Meyer and his staff built, an SEC-style defense that's predicated on generating negative plays through pass rush, forcing turnovers, and playing a fair amount of pres coverage in order to match up against good passing attacks and win big bowl games in warm weather climes (worked pretty well last year). Doing that requires quick athletic DL and to some extent LBs who can be worn down by Tressel ball, and Meyer's defenses have consistently given up quite a few rushing yards as a result. Normally, that's not really a problem because the power-spread run offense, especially when run up-tempo, scores too many points to allow an opponent to win solely by slow grinding on the ground. But an offensive [Mark May] show makes the Tresselball approach workable. So, some of the defensive weakness against MSU was a systemic flaw, and a choice to pick a poison that's generally worked out well. That said, under unusual circumstances like those on Saturday, adjustments should have been made to create confusion and sell out more against the run, and failure to day so was a problem.