US Youth Soccer has taken control as of this year of the National Championship series and National League by doing a reorganization. There are now 13 "Conferences" and technically CRL is no more. Its now called National League - Pacific Conference (powered by CRL). The Pacific Conference is now basically just Cal South, with Cal North teams migrating to US Club soccer from US Youth Soccer. The top teams in the Conference will earn advancement to the US Youth Soccer Regional Championships and a chance to earn a spot in the National Tier of the Leagues Program, the US Youth Soccer National League.
One of the reasons you will see some weaker teams admitted is economics. Cal South pays the way for the top teams to go to Regionals (bypassing the National Cup qualifier). We need a critical mass of teams and with the Cal North teams not really participating we get a few more weaker teams in the brackets.
That said, with almost every league there are a few dominate teams that whip the other teams by margins of 4,5,8, etc. The DA has this, ECNL has this and virtually every other league has this.