On Makeb you will have real advancement, you know level up, FP, OPS, WZ, new usable (better) gear, not just empty shells, a story with more than just 8 quests wich will take more than 1 day to complete unless some freak spend 20 hours straight in the game.
Oh and Makeb will not disappear after 2 weeks like this event right now or the rakghoul on tatooine.