I suppose players might have switched teams, but I don't see a big impact on G02 in terms of the teams. Consider the following Development Academy Clubs:
Albion SC U-16/17 Not SCDSL (CSL)
Beach Futbol Club U-16/17 Looks like their top Flight 1 team (one of SCDSL's best) went DPL
Eagles Soccer Club U-16/17 Not SCDSL (CSL)
LA Galaxy San Diego U-16/17 Not SCDSL (CSL)
LA Galaxy U-16/17 Looks like their top SCDSL team (
LA Galaxy South Bay Girls 2002 Elite) is returning to Flight 1
LAFC Slammers U-16/17 Hard to tell but looks like all Slammers best Flight 1 teams returned.
Legends FC U-16/17 Looks like 2 top Legends teams left Flight 1
Los Angeles Premier Futbol Club U-16/17 Not SCDSL (CSL)
Pateadores U-16/17 Best Flight 1 teams returned
Real So Cal U-16/17 Seems best Flight 1 teams returned
SC del Sol U-16/17 Arizona team
San Diego Surf U-16/17 Seems best Flight 1 teams returned
So Cal Blues Soccer Club U-16/17 Lost better of 2 Flight 1 teams; but may have moved some of the better players to the other Flight 1 team.
West Coast Futbol Club U-16/17 Same Flight 1 teams returns
So, in summary, it looks like SCDSL G02 Flight 1 lost one good Beach team, 2 good Legends teams, and one good So Cal Blues team that are Development Academy clubs. That's 4 out of the 40 flight 1 teams from 2016. Not exactly the end of the world. But, of course, it will ultimately depend on player movement more than team movement.