I think we need less old junk now and more 2409 stuff. :p
I think we need more "Star Trek" stuff and less "Generic Space MMO #5" stuff.
The TOS Bundle showed that the devs can make a really good bridge and interior of appropriate size and aesthtic feel. We need more of this. Much more.
Additionally, there are numerous uniforms that people have been asking for since launch that should be added to the game as soon as possible.
On top of that, there are ships that still need to be added (like the Ambassador) and if the forum topics of late are any indication, we really need an upgrade or retrofit system, that allows people to play their favorite ships from start to finish.
Then, after all these things are done, and an appropriate "Trek" feel surrounds this game, more generic space MMO stuff could be added.
/Sigh, I don't really like the "game" part of STO very much (even though it's getting better), but I cant help but to spend money on all the trek goodies in the C-store. If all show & film interiors came out right now, I'd probably buy at least half of them.