FYI. I've been to a Bears-Packers game.
So, I most certainly do have a general feel of the "divisional" rivalry aspect, because just a little bit more is at stake in such a game.
Nevertheless, ticket prices vary by team and level of performance. (Oh, how sad it is to look at the Chicago Bears graph)
http://seatgeek.com/football-nfl-ticket-prices/
Based on the money then. Cowboys with NFC East will remain a hot sell. For other teams/divisions, it is not that much of a factor.
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EDIT: And another thing missing. Past NFL alignments. I doubt we've looked much into those. Sadly, these configurations aren't in Wiki. So, part of me is actually look for those -- to dump into there.
:3