I am a commuter and allthough i dont love the idea of monthly standby, i dont think it will be that bad. We can still call pre ops ahead to try to get a flight and if we dont manage to it will mean sitting halfway or having to stay down, but that may only happen once or twice in the month, no different than throughout the year.
Also we will get our guaranteed amount of days of after a trip, ie 3 days after lax. As for not getting called out i can honestly say i never not get called out on a standby but that could just be my luck.
I agree its not brilliant and i would rather not do it but if it happens i dont think it will be as bad as all that. I know our flight deck are allready doing monthly standby but do any other cabin crew from other airlines do them?