Legends and Beach put their top teams in ECRL because any other decision would kill their chances of an ECNL membership.The GA league has a few strong teams and some really weak teams which leads to blow outs. ECNL is much stronger throughout so the competition is better. ECNL Showcases will be the best attended events for exposure. It is where most of the top teams are, so it makes sense for a college coach to attend where most of the best players are. ECNL has been around a long time and has a great product. GA is brand new. The league needs to prove itself with showcases and quality.
That Legends and Beach put their A teams in ECRL and their B teams in GA is as big a statement there is about the quality perception of the two leagues.
It has absolutely nothing to do with a perception that GA is weaker than ECRL. It has to do with a perception that ECNL is more stable and more profitable, which it is.
Nor does it really say much about parity within ECNL. There are plenty of weak teams and blowouts in ECNL. Any league which does not relegate weak teams has blowouts, and ECNL is no exception.