I will admit with the next wave and its TIE Bombers and B-wings, I will have every ship I really want to see in a starwars dogfighting game. I not a huge fan of the expaned universe ships, but I am aware of how a game needs to keep releasing expansions to stay alive. My suggestion is expansion packs that don't have fighters is them (at least not new ones).
The only ship that is out that I don't have yet is the Firespray. And I will freely admit I am at least as excited to use the new expansion cards that come with the firespray as I am to get the ship itself. When ever they add new upgrades it boosts all the possiblities for all the ships I already have.
I would also like to see some new pilots, or at least old pilots in new ships. Let's see Howlrunner in a TIE Interceptor. Or a new TIE Advanced Pilot whos abiltiy doesn't suck.
Even I could even see Darth Vader in a Shuttle
Even in the expanded universe (as long as the time line is close) most pilots still fly the same ships. I'd totally buy a Rouge Squadron expansion with new pilots for my X-wing (even thought I don't realy know who these guy's are)