Every single year under Kelly we have played a 3-4 with passive, two-gap defensive line.
I am serious. One of our big contributions to U of M wins was our defensive scheme.
1) As Alabama clearly stated multiple times (by multiple sources, players and coaches) ND's defense was predictable. This allowed other opponents like Michigan to do things they couldn't against a more aggressive defense.
2) This is exactly how a situation would occur that has been discussed many times; when less talent trumps more. For example, even though we won the Navy game last year, their offensive line beat our defensive lines' asses embarrassingly so, and caused us injuries that cost us during the balance of the season, (e.g., Pitt loss, maybe even Stanford.)
3) With the offensive limitations last year and Greg Mattison teeing off on them, ND's offense couldn't even help the defense by keeping them off the field. This year should be different when discussing our offense.
Even though Michigan has an offensive coordinator that can walk on water (b.s.), an aggressive defense will finally expose their line's weaknesses, which we didn't remotely do last year; but, all kinds of teams with less talented defensive fronts did. (Not talking MSU or OSU, even, think UMAS.)
If we can change it up on offense, keeping our offense on the field, (it would be interesting to know the last time we dominated time of possession with U of M), and our defense went off on their work in progress (offensive line), and actually put some pressure on Devin Gardner, it will be a totally different outcome. Guaranteed. I betcha.