There's a couple other A-Wingers, I think 1 or 2 Y-Wingers... B-Wingers are just standing around on Home 1 but so far they only made one from the movie and one from EU. I could see it being more diverse than just orange then. Yavin has the most with lines though, for certain.
Certainly there are more, but it seems more likely--certainly at least to the author of the original comment--that X-wing orange pilots would round out the packs. Either way, he was describing the hypothetical content of a pack without the astromechs and TIE pilots rather than the current content that has merely one orange jumpsuit.
For my part, I'd guess if they had gotten rid of the astromechs and TIE pilots, they'd probably have expanded the scope of the packs to all three original movies, which would most likely mean more orange. But it's all just guessing.
I love the inclusion of astromechs. Not only were they the largest draw to me in these sets, but I'd like to have dedicated astromechs for every X- and Y-wing pilot I have. It's too bad I'm such a lazy customizer.
I do wish they'd paid more attention to the movie where Frix's astromech is barely viewable behind his head, has a white paint job with dark panels and may even be an R5.