repetitive linear space combat got old in 2 weeks,
lack of fellow players to group with to do simple heroic dungeons, makes leveling impossible.
awful edge of world restrictions, tattoine especially has these odd areas where you are discouraged to explore, its a mmo guys!
no retribution for hacked players who have tampered their client to improve player speed in pvp is only 1 example. players abused bugs in the system and no one has had accounts suspended or removed.
lack of end game content.
bugs.. so many bugs...