While I agree with you when flights will be OK, it's not how elite youth leagues work. US soccer would never add all those teams and ECNL won't either. Of course, for travel and competitive purposes it would be terrific. It makes too much sense for national soccer leaders to make happen
I can say clubs in different leagues setting up for showcase events themselves if no showcases until 2021. Play 2-60 min games on one day with 3-4 clubs for example and invite many coaches.Up and down CA there would be plenty of small showcases you can hold. San Diego, LA, South Bay in No cal, Peninsula, SF, and Marin/Santa Rosa areas, Sacramento, etc.