I would hope a caveat would be put in place ensuring that 2 rival teams would play each other every year. My ideal realignment/schedule would first consist of geographical aspects like I mentioned above, then only playing your division opponents once per year (alternating home & away every other year). This would allowed teams to play a larger number of opponents and keep the window open for that guaranteed annual rivalry game, no matter the conferences of the teams.If anything you might justify putting Dallas in the south and Carolina in the east. But more the the point, the reason they are in the east is to keep long-standing rivalries intact, which is an important aspect to fans. How would you feel if we didn't get to beat up on the Bears every year?