To each his own.
I think it's silly that you can have an average season (4 losses even), but because you're in a weak division, with 1 game you can still make the playoffs & take the place of a team that had a better season, played a tougher schedule, was in a tougher division/conference, etc.
The problem is we might perceive that one team had a harder schedule and played in a tougher division...but the team that went 9-3 might just have had the harder road...it is just so tough to tell which divisions are weak and which are tough because so few teams play interconference and there are sometimes few interdivisional games.
One year, you could have a 9-3 Alabama and the rest of its division is 9-3 or worse and then they play a 12-0 Georgia that also has a 11-1 Florida in its division...on the face, it looks like georgia and Florida are the better teams, but if Bama's division had a bunch of solid teams, the record could be worse but in the end they are better.
I like scenarios where teams know what they need to do to get to their conference championship...in the fuutre of the big ten, there will be a year where three teams could go undefeated and yet one won't make the conference championship game....and that might be end of being the best team, who ends up not having a shot at the conference title. At least with Divsions, teams end up in a collision course to play each other....
I have no problems if they were to shake up the divisions...and even if they did it yearly or every other year based on the previous four years results...but when you get big enough in a conference that no all teams play each other...it makes it very easy to leave out a team because you didn't set it up for teams to eliminate other teams through divisional play throughout the year.