So Brooky is shit, unpopular and expensive and you still defend it as a future venue in the NRL
Historically one of the best attended grounds in Sydney, was drawing 15k a decade ago. There's potential there, if there were owners who give a shit about something besides point scoring against other stakeholders in the club and some work done on the facilities I don't see why that can't happen again.
I have zero issues with a move to the SFS however. There are plenty of Waratahs and Swans fans who have some interest in Manly who with some decent targeted advertising could probably be convinced to come to Eagles games there. It would just require a bit of vision from the club.
I haven't bothered with membership since Tooves got the arse (and I probably won't until the club changes hands) and I haven't been a ticketed member since 2006 when I moved away from Sydney but I can completely understand why people wouldn't bother with ticketed memberships if half of the games are going to be at absolutely dross times.