One point of speculation regarding a potential expansion to a 12 team playoff is that it might encourage conferences to do away with divisions.
The need to have a conference champion be ranked highly might influence the major conferences to try to avoid a situation where an underdog from one division upsets the favorite but remains ranked too low to get an automatic bid. It wouldn't be common but could happen occasionally.
The Big 12 already does it this way, albeit with only 10 teams.
The ACC could seemingly benefit. Their divisional alignment and schedules are a mess.
The Big Ten has divisions that make sense geographically but there are concerns about strength imbalance.
One possibility would be that each team have 2-3 protected games and then rotate through the rest of the conference.
The need to have a conference champion be ranked highly might influence the major conferences to try to avoid a situation where an underdog from one division upsets the favorite but remains ranked too low to get an automatic bid. It wouldn't be common but could happen occasionally.
The Big 12 already does it this way, albeit with only 10 teams.
The ACC could seemingly benefit. Their divisional alignment and schedules are a mess.
The Big Ten has divisions that make sense geographically but there are concerns about strength imbalance.
One possibility would be that each team have 2-3 protected games and then rotate through the rest of the conference.