Im coaching in the PFL currently, and the ELF will be interesting.
Word we are hearing is that they want to expand by 4-8 teams next season, and eventually expand to 30-32 teams and 8 countries.
There are enough well run programs to get there, but finances are going to be a challenge, as some of the teams have major title sponsors and get the best guys, but other programs are limited by location and lack of funding.
The National Leagues are pretty diverse in their domestic player rules.
PFL teams get:
2 Americans (if you played above HS level outside of Europe you are considered one of these two players)
1 Western European - this includes pretty much all of Europe except Lithuania, Latvia, Belarus, Russia, and a couple more
3 Eastern Euros - We have 1 Lithuanian, and 2 from Belarus (those leagues are far below ours, so its a crap shoot on who is as good as their film shows)
ELF is different, but there are still domestic player rules.
If it works it helps all of us long term, but will be tough on the top leagues, as Germany is having a challenge here.