A:
I don't really care if we can upgrade our ship, it would be nice if we could buy or steal a ship of our own but it does not matter enough to me, though it probably will to other people.
B:
This would be a nice addition, however in Star Wars their is never much of a third party to speak of, there is only black or white, rebellion or empire, republic or sith. That is what the whole setting is about. Perhaps you could join the exchange as a smuggler or some other faction, but it probably won't happen.
Strongholds are already in the game after a fashion, your ship is your stronghold, now we just need some quests and activity to go along with it.
C:
More planets are nice, but I would be happy with more areas on the planets to explore, like Taris. More ship stuff like the Leviathian is a good idea.
I would also like to see you forced to rely on your party members' skills much more, once I got Juhani on my side I wandered around with three jedi the whole game, it got pretty boring because I could use persuade or lightsabers to solve everything, it would be nice if there were some quests that could be made much easier by using NPC or PC skills rather than brute force.
TripleRRR