Its all coming to an end soon. MLS youth academies have no interest in the current structure and they realize MLS pulled off a public relations stunt when they agreed to take over the DA. They have made that clear to the league office and there is no way the MLS is going to keep funding a league for non MLS for free. The free ride is coming to an end next season.
As the world gets back to normal, they will restructure and come up with a Division 1 and Division 2 structure or simply drop the non MLS clubs altogether. At this point the MLS youth academies are plugged into the local market and they can find the talent. In terms of needing them to play games, NYCFC and Red Bull kept scrimmaging all season long so anybody who thinks they need to keep them for games, you are dreaming.