Just ideas :
-More big rocks meshes and a lot bigger Oblivion style or Crysis instead of only terrain texture for rocks
- rework the texture of rocks little meshes it is too dark compared to the level : they don't mix in environnement : they need similar lightening and colors
- Floor texture could be High res ( or use some textures in high res from follout 3 mods ,just to see the difference)
-plants need an alpha cut shader


Anyway looks very good and i like the idea of RPG elements like in Borderlands that is an incredible addictive game.
And already looks great and make us want to play it

Keep it up !