Right now, whatever happens it is a double edged sword.
If FFG crumble and release a 'Yavin Aces' pack with the X-Wing and Advanced fixes, we get two more complaints:
1) People complaining they have to buy a double pack just for one ship. "What do I want with an X-Wing expansion! I play Empire, I'm not paying $30 for a TIE Advance and a ship I don't need!"
2) People who bought either epic ship (mostly the Rebel players) to get the expanded stuff, only for FFG to turn around and release them in a cheaper pack. "What the hell FFG! I spend $75 on a Transport just for the X-Wing and NOW you release it in a smaller, cheaper pack! Get lost FFG, worst company ever!"
They can't win, either way something is bad. If you want the TIE Advance expansion here is my advice, buy the epic ship and either suck it up or sell the stuff you don't want on Ebay, because right now the 'solutions' other people are coming up with would just cause more issues in the community.
I enjoy epic, and I am glad I do, if you don't I feel sorry for you and understand your pain, but this is how it has to be. Who knows, you may make back a majority of your money on Ebay.
But that's just a massive straw man.