I agree with rakata, with leaving the forces there, something may happen to draw people back to planet
How about the ability to put all your companions halos or otherwise in 1 stronghold, so people can go to one stronghold and see all your achievements.
How about like I have seen in other games, the ability to purchase any cartel pack from website, so if I wanted crimelord, I can purchase a set of 24 or 1 using cc from website, because sometimes it is hard to find that just one piece on GTN.
Hope about a area where you can fight mobs like the droids on tyhon, you start with one lvl mobs and each group goes up in lvl and power, perhaps even type, and if you reach a certain lvl you can get a chest with a random piece of equipment in it.