the regular season.
The only way you get a 5 game for the winner type playoff system is by reducing the amount of games in the regular season.
The current system is good. We just need to require more OOC games between P4 teams in the regular season. Doing this helps make the regular season better and it gives us better data on how hard/good the SEC and B1G really are in any given season. If they dominate OOC play, then give them 4 of the 12 teams.