This is ludicrous. Injuries happen frequently when you have a mismatch in talent on the pitch. A player is too slow to stop the more talented player and comes in late on a tackle, etc. This is why HS soccer injuries are so prevelent.What I mean is that as a club you treat both ECNL and ECRL the same by evaluating the teams played each week and allocate the players needed to win. If you're a super club this means the week your ECNL team is playing a poor club you shift all your best players to ECRL. Or if you get ahead in the ECNL standings you start playing top ECNL players in ECRL games to get both teams to nationals.
Heres another flip say a poor club wasnt doing well in ECNL but was ok in ECRL. Theres now incentive to give up on ECNL and just put your best in ECRL.
Above is what I mean by with a single pool why run to leagues?
And, go tell a top player at a top club that they are playing a B league game this week and see how that works for you.
Culture and camaraderie matter if you want to compete at a high level and have fun doing it. This is supposed to be fun afterall. Moving players around is inconvenient and not much fun for the players and families.