As much as I would love to see the Pats in the same division as the Jets, Giants, Eagles. Its never going to happen. No way the NFL gonna want to break up the NFC east. You'll have to much confusion with teams wanting to jump ship. I couldn't picture the Eagles or Giants coming over to the AFC, and do we really think the Pats are gonna jump over to the NFC, and play their games on Fox, even though one of the most popular bar/restaurant in the stadium is the CBS scene? I know that might sound stupid, but there's a lot of money involved with that.
My opinion, keep the playoff seeding the way it is, but get rid of the AFC vs NFC regular season games. Realign the divsions. For example, move Baltimore to the east, Indy to the north, and Miami to the south. *
Each team plays division team twice, and plays the rest of the conference once. **
Home and away rotates every year. Therefore a team like the Ravens, who already have a rivalry with us, will build off that, but can still keep the rivalry going with the Steelers because they would still see them once a year. Sucks we won't see an NFC team, but really how many rivalries do we have over their besides the Giants? Even then we only see them every four years.