RandomSoccerFan
PREMIER
GAs most recent add Sporting United FC was ECRL before switching to GA. This is new and will put pressure on ECNL to move ECRL clubs to NL or risk losing them to GA.
GA loses 4 of their top clubs nationally in one season to ECNL - you say it's a nothingburger. ECNL-RL loses a club rated #500 in the country to GA - which accepts them - and you say it's putting pressure on ECNL. Be consistent. GA is losing top clubs and trying to maintain quantity while all top clubs are getting pressure from parents to move.
With the number of clubs all the different leagues are adding its clear that 2 separate mega leagues are here to stay. There's a couple of things that could change the entire landscape (NWSL Next, a buyout, etc) but they're not likely to happen in the short term.
There is too much inertia for anything to change significantly in the short-term, but the longer-term trajectory seems pretty clear.