Just shooting from the hip here, since many players have appropriate gear now how about turning Illum back on for a week here and there. I for one never got to try it, seems like it was a solid idea and now that we have much more balance in the servers maybe it will work just as intended.
Along the same lines any thought about a PvP planet? Perhaps it resets once a week or once a month and the goal is to take way-points until the timer is up or until one faction controls the world.