I honestly think there's probably 7-8 teams you could justify for the last spot or two. This is the problem when you go to more and more teams you start getting into good not great teams which there are a lot of them.
If the B1G had more teams ranked preseason, Michigan would probably be in. They have 2 losses to Oklahoma (who's very decent) and USC who's good but not great.
But since SEC had 9 preseason ranked teams (and 3-4 of those are pretty mediocre) then they get credit for beating ranked teams that in reality weren't that good.