The Basic 3
Server Merges
Improvement in the new player experience through 1-60
Outpost Rush Speed Exploits (since beta? now a lot of people abuse them daily)
And even with all of these fixed, the game is still lacking quality because these are not features, these are basic foundations of the game that are expected to be available after you pay the price tagg of 40$.
Now we are watching a continue population decline without end on sight, no new players will want to buy this mess and no old players will stick around much longer.
If you really have a big team , January should have been the month of new features, specially for our PvE folks, a month to actually stun everyone with your creativity, technical execution of AI, but no , the game is broke good luck getting the quitting players back in the MMO genre (after they feel they are completely out-grinded by the more persistent players).
I think this game should have been PvP oriented, the PvE was lacking since day1 and you don’t seem to have the resources to make it happen with this early launch either.