The beauty of being in CA is that your talent depth is consistent. As "top" players move around, other will rise up and fill roles. Legends and Albion may have been hit hard but their brand is good enough to attract and recruit new talent that may have been over looked previously for whatever reason.
As far as showcases are concerned for the GA, all have been scheduled at top facilities across the country. It's up to the GA to demonstrate they are able to execute quality showcases and game day experience. The coaches will come, they are an equal opportunity population and connections to GA leadership run high and deep. Coaches like shiny new things and this may help the GA.
Of course, the debate of which league is better will persist between parents, marketing departments, etc. It's a fun comparison to make since everyone is biased. At the end of the day, if your DD plays consistently in one of these leagues, and your family has the means to enable it, they will be put in a position where they can play collegiate soccer somewhere. Not all will play for stanford or UCLA, some will. Most will find a home at a school to their liking.