To me, if your going to play a 17th game everyone should play an international game every year.
Mexico, Germany, Puerto Rico, Nebraska(I kid), France, England, China, India...
This is where opportunity for growth exists. It's fertile ground and ultimately good for the game. But, yeah, maybe include some American cities/states that don't have franchises in that tour program.
It makes parity easy or the league will grant the Patriots nine home games per year because Kraft breaks out the 111 year old malts when Goodell visits his offices.