It seems it originated from the days when teams traveled around by bus, but in the modern era the travel time is inconsequential. The NFL could use a computer program create the annual schedule based on the records of teams from the prior year, attempting to get the strength of schedule even as possible amongst all teams. Seed the top 12 teams with the top 4 getting byes.
[ Edited by Liono on Dec 29, 2013 at 11:40 AM ]