Ohio State won their conference. Won two games against top 4 teams when games were played.
Alabama best who? Lost their division. Didnt play in conference championship. Alabama is out.
This is probably a good indication that some of these conferences are too BIG. I think the playoff selection process can handle a situation where two of the top four teams in the country happen to come from the same conference. But as we saw with Alabama and LSU a few years ago, the process breaks down when you have two of the top four teams in the country playing in the same DIVISION of the same conference.