Michigan also had a sweep of Iowa. That's important in the discussion you seem to be leaving out. And beat San Diego State OOC.
The SEC and B1G we're very even this year, I would lean the SEC being better, but the NET had the B1G as the better conference, but it's close. And yes the SEC has alot of high level wins OOC, and their seeding is reflective of that(outside TN, who I though should have been a #2)
Also, teams get selected, it doesn't matter what conference you're affiliated with.
If you're taking one or multiple B1G teams out, you have to have a good replacement for them. I said A&M should have gotten in, but not at the expense of a B1G team. Nobody else really deserved it IMO.