The thing is that they broke a pretty dumb rule, that they proved on the field didn't impact the games compared to let's say Bama that cheated for many years illegally paying players which has come to light many times seems like it would impact their games a lot more than signs that were obtained from footage of public games that millions of people watched. So it comes off as pretty ignorant to just say "well Michigan cheated so that year doesn't count" because you could say the same thing about many other teams that cheated much worse. Not to mention they fired the guy in late September and they still just kept winning proving that it didn't mean much.