Heres a though:
Maybe the parents of the football players should seek some advise from the parents of the cheerleaders. Meaning, if I am not mistaken, in 2005 the cheerleaders parents had had enough & they called & visited & called & visited & even met several times with the administration, not only @ the school, but even at the central office, until they finally reach mutual ground. At that time they got a cheerleading coach & asst that did wonders for the girls as a team. I am sure that if you ask maybe a senior cheerleader's parent they could give you the info on what & how this was done. Basically, instead of continuing to complain, they took the bull by the horns & banded together & actually saw results.
BUT, this will only work if all parents come together, problem will be that the parents of the senior players will have the same thoughts my parents did my last year. "This is my son's last year" & you will have very few freshman parents will get involved, they think this will cause their child playing time.
Anyway, like I said this is just a thought.........