US Soccer prohibits the 2 man system like you see in high school and college but they are going to have to start thinking of something to keep the games covered. Perhaps a training in the 2 man system needs to come to the US soccer side
The two man system is an abomination and dilutes the authority of ONE Center Referee that makes the same consistent calls on BOTH sides of the filed seen by the SAME pair of eyes and decided by the SAME brain.
The two referee system is a two headed schizoid that is illegal under USSF standards.
How about all games from U9 to U11 just use the coaches to call the game? Save the referees for U12 and older.
I think you have to have referees no matter what the level. However, we can cut down on the number of AR's needed. If I were king, I'd make a hard split between competitive travel and rec travel at the U13 and up level. The top teams move up to play 11v11 on the full size field and get two AR's. The bottom teams continue to play 9v9, or even drop back down to 7v7, on the U11/U12 sized fields with just a CR and stay 60 minutes long all the way through U19. Maybe the teams in the top four brackets be considered competitive. The benefits are numerous.
1) We would need less than half the AR's we currently use, leaving more experienced refs free to concentrate on being CR's.
2) The CR's would be working shorter games at the rec travel level, allowing them time to work more games. It would also allow aging refs that can really only physically handle a couple of hours a day to do two or three games instead of one or two. And by working a smaller field there would be additional savings on wear and tear of the body.
3) The cost of rec travel would drop significantly as the referee fees would drop in half for their games.
4) Rec travel teams would be more likely to hang on additional years as they wouldn't need as large a roster to compete due to the games being 9v9 or even 7v7. And by having the games only be 60 minutes you get around some issues with time conflicts as well as not needing as many substitutes due to the shorter games.
5) The game would be more fun for rec level teams as they would average more touches on the ball due to the smaller field and lower player count. This would have the additional benefit of being better developmentally for when those kids are ready to step up and join their clubs, or another clubs, 11v11 competitive travel teams.
6) Field shortage problems would be lowered as less full size fields would be needed. Most clubs U11/u12 fields sit empty on Sunday's so there wouldn't be an additional problem created for the majority.
I could go on but it would be a win-win in my book.