i doubt it is much more than harbaugh not answering the questions because he's weird.
regardless, its a black mark on the program. or at least it will be perceived as a black mark by those who care about such things. and besides that point, it will be in the news for a few days and people will take their shots at "holier than thou" michigan and those that still believe michigan is somehow "holier" than other programs will be upset about it.
i think its more fuel for harbaugh to leave and can be an excuse for him to go. "fed up with the ncaa" type stuff, rather than "i really want to go coach in the nfl again," which is likely the real reason.
i think this is a nothingburger. but i also think michigan needs to cheat better and i dont believe they are holier than anyone (other than michigan state). that said, it IS a black mark on how the program likes to view itself and the image it likes to give off to the rest of the world. it will be played up by the media and - like with juwan and the wisconsin incident - be bad publicity for the university.
so i expect harbaugh to leave, then a bunch of players will transfer, and a team that was set up to win next year will be gutted and not live up to expectations.
when it rains it pours.