You are right that united is more what I am thinking.I'm not sure this is really true. I'm sure there are great select teams out there, but when my son was starting out the extras/select teams they faced couldn't really keep up. United is a different story, but it's also contributed to the thining of Extras and select teams by picking off the cream of the talent.
The problem with the approach you suggest is that AYSO is under its own umbrella, insisting on its own philosophy and licensing, and so it's very hard to incorporate into the pyramid structure (which is why its started to tier itself). The other problem of course is an incentives one...the select coaches are in it for love of the game and personal glory, so there really isn't an incentive to do much more by the way of coach training. The club coaches are paid so there's some accountability there. Indeed, one of the problems United has identified is "accountability", in their words, of volunteer coaches....whether having some of them a little too focused on winning v development, or behavioral issues, or failure to take the required training. In Socal, this had led to United trainer's taking a more centralized one-club approach and taking away some independence from the local club DOCs.
United plays in the bronze tournaments by us. They do just fine. Last one I reffed, they came in 3rd and 4th out of 8.
Philosophy is a huge barrier. Why have united if everyone is equal? Some regions won't even touch it.
Did centralizing united coach training help, or is it too early to tell?