They need to reconsider redoing,
the grass in the game. (Lines of grass.. look bad. make it better)
the textures.
Enemy & Character Movement/motions. (1.0 good example of this.)
Loading of unseen objects. (We load the hole zone and much of it we don't even see. If this was added could improve graphics/loading speed)
Fixing Model designs of few things (They looked glitched/messed up)
How game is designed. (Example: Having people gather at Northshroud for coil2. This causes that zone to be more busy and they had to remove npcs because of it. Could of been fixed if everyone could enter it through duty finder instead from any zone.)

So many bugs in this game its not funny. Sad part SE isn't fixing them at a decent rate. Takes them 6-10+ months to fix a simple bug.