I'm not sure if the NFLPA would be totally onboard with increasing the roster size. The players get 48.8% of all revenues. If more players are added to the pool in reduces the average share available per player. An increase in player percentage would have to wait until a new CBA. They probably have other issues more pressing.

As for the international games, from what I keep hearing the plan is to have 16 international games every year with every team taking part in one as the 17th game. So each team will play 8 home, 8 away, and one neutral field international game every year. International travel is not as cumbersome as it was 20 years ago. The teams all fly 1st class with comfy beds. Most teams choose to take their bye the week following those games so rest isn't an issue.

And I believe the product on the field is more adversely affected by the reduced hours allowed by the NCAA for contact with the athletes per week. The players are entering the league less and less prepared. It's just made worse by the number of players entering the league early.