If I were an NFL owner I would say they should go one better. I'd say the Super Bowl should be between the two best teams, not the best team from the AFC and from the NFC. The 12 best teams by record make the post season. The 1 through 4 seeds get a first round bye, and in the subsequent rounds the lowest remaining seed plays the highest remaining seed and so on. So what if there's a chance that a team from, for example, the AFC West does not make the playoffs? To make the playoffs a team should go out and win most of their games and if some division is so weak that none of the teams can come up with at least the 12th best record in the NFL, how on Earth is anyone going to argue that they "deserve" to make the playoffs?
Conversely, say the Pats and the Bills both end the regular season 15-1. The Bills win the AFC East by a hundredth of a percentage point on some tie breaker way down the list. Under the current system the Bills get a first round bye and most likely home field advantage throughout the playoffs. The Pats get no bye, and at least the potential to play every single playoff game on the road in spite of their tying for the best record in the NFL that year.
Superior performance should be rewarded. Stumbling through a season and getting a home field playoff game simply because you were not quite as bad as the other teams in your division should not be. Yes, I know that the 15-1 wild card team would likely do well in the playoffs. Be they the Pats or any other team they would likely go far because as a 15-1 team they know how to get the job done. But why should the 9-7 or 10-6 or God forbid 8-8 team they are playing be declared "better" and get the advantage of a home game simply because they didn't do quite as bad as three other teams they were stuck into a division with?
I'm not saying wipe away divisions or conferences. Playing a team that is geographically or historically tied to your own team twice a year keeps it interesting. I just think that, as others much smarter that I have said, the playoffs is a whole new season. Take the teams that have proven by their regular season records that they deserve the right to be there and let them duke it out. At the end I want the two strongest teams to play for the Lombardi Trophy regardless of what conference they come from.