There has long been team discomfort in Thursday night and international games because teams have a reduced rest period. A 2 bye-weeks schedule was attempted in 1993, but was dropped, it seemed in large part due to the excessive disruption within each team's schedule. Thoughts of expanding to an 18 game schedule (likely removing two preseason games) were hinted at by Roger Goodell during the 2016 season, but were tabled for the time being. The big barrier was likely player agreement given the increase in games played and wear-and-tear on the bodies, but an additional issue was that the scheduling would become imbalanced relative to the symmetric format used now.
However, if the NFL instead added 4 extra weeks to the season made up of 3 games and a second bye week, it would
- Allow teams to maintain a symmetric schedule (either by adding a second intra-conference division or matchups with equal position teams in the opposite conference)
- Increase the overall game-to-rest ratio
- Allow the NFL to schedule bye weeks for teams the week before playing in Thursday night games, as well as adjacent to international games.
- Allow weeks of the preseason to be eaten up, and also expand the season further into one of the seemingly-ripest lull periods (particularly in the less bustling cool season) in American sports, January and February.
Are there any complications, other than the player concerns of adding more games, that would hinder this scheduling change option?