I think that the graphic impact would be good for the popularity of the game in the future, so I was I thinking why it feels there is something missing, I got to two points, volumetric fog, and format of the rocks.
Volumetric Fog is very powerful in changing the mood of the scene,
and the Rocks currently look a lot like 2000s MMO rocks,

Look at those rocks of a Chinese MMO, it looks way less blunt and generic.
I think those two point would step up the graphic significantly, and they wouldn't take much effort.