I believe they have a good foundation to make a JTL type expansion with the GSF addition. I have no idea of the complexities involved of course to make that type of expansion but with the flight model in place you would think the hard part is done. Now making a more "open space" type play area would be very nice and I could see pve and pvp just like in the ground game. Having areas that are Empire or Republic controlled, could be captured...etc etc.
Also just to throw it out there and wow how cool it would be to have guild capital ships!
Yes I know before anyone calls me a nut I fully realize I'm fully speculating and dreaming !