Stan W, you have the right stuff.
Rosters, pay...most important and then base.
Regardless of what the loudmouths think we are all cogent individuals capable of making p our own minds about unions and unionisation.
For my part...wouldn't go near BALPA or any other ALPA even as a last resort.
Legal insurance? You are better off with ALPL.
Nevertheless, my opinion is only a ripple in the pond.