don't forget demographics...
If you have lots of Asian kids in your HS-bad for elite football (eg: Irvine USD) and team sports in general (good for band, golf/tennis/badminton)
If you have first-gen Hispanic kids in your HS-bad for elite football (good for boy's soccer-not so much for girl's soccer)
If you have middle/upper middle class white kids, good for football if you can keep them from going private (eg: CDM, Edison, MV, San Clemente)
If you have middle/upper middle-class 2-parent family black kids great for football
If you have lower middle/poor black kids, hit/miss (due to problems in home)
If you have Polynesian kids, great for football (football replacement for warrior training in traditional culture)
If you can get a mix of 4 through 6 in a large public HS, you have a dynasty (eg: Oceanside HS, Poly, Edison in it's heyday, Los Alamitos in it's heyday)
If the development was built 15-25 years ago, schools are likely to be large and full of middle-class kids-good for football. 40-50 years old-less kids, lots of retired in place -not good for large numbers in football.
My point-demographics are destiny. Suspect some of the issues at Poly are demographic, some district policy, and the combination of the two may lead to talented kids going private (Trinity League, Serra Gardena, etc).
Is St. Anthony/Long Beach football improving? This may be a bellwether of what is happening in LBUSD also.