A prototype A-wing with refit is good value at 15 points. Two of them for 30 is potentially less value in terms of what else you can pick up for 30 points (a decked out Jake Farrel, a TLT Warden. Heck, even Wedge with an R2 and IA). With Zs, 12 points is decent for a Bandit, but a pair of them for 24 points is still good value. It's only competition for that exact value is an FCS B-wing or a TLT Y-wing, and even then, the choice is more down to the flavour of the rest of your list.
Their value as cheap ships has diminishing returns as you take more, unless you have a really well thought out plan (and a fair bit of practice) on how to use them. Nothing's impossible, but there are just better options than swarm As.
With that said, I love throwing one or two green squadron into builds. Gemmer Sojan has recently become the hero of a few games, too.
Please recount the details of your Gemmer Sojan conquests, I am very intrigued.
Gemmer with PTL and AT for 25 points has been just a really value-for-money investment every time I've used her. Either people ignore her, and I can use her as a flanker, or people see an A-wing ace and feel compelled to destroy her, in which case she can draw a lot of fire while being surprisingly effective at dodging it. She wants to be at R1, which makes her a startlingly good brawler, which can take people by surprise. I've tried her with Juke, but her PS isn't high enough to get the value out of it, and with Wired - which was surprisingly effective. She makes an excellent hunter of TLT carriers, being well able to keep up with slamming K-wings, and being an absolute nightmare for Ys.
She's probably my favourite A-wing pilot, oddly enough. Jake is better for so many reasons, but I just find her so much more fun to fly.