Probably best to start your own thread and link to this one Xier. Advice off the top of my head would be to simplify the textures (although that is a lovely wall texture), make sure your perspective is consistent (compare the top of the tower to the statue for example) finally make everything a bit bolder and more exaggerated. Oh and don't match perspective to the character assets, the character assets are at a different perspective to the perspective of the ground assets (3/4), there is nothing to do about that at this point.
@decroded
I completely agree,
Unfortunately I don't have much control over the art direction / organization of this project unless I take a personal vested interest in managing the project on my own time. I like to generally put my all into freelance work but I can't afford to work for free on someone's else project without some kind of incentive.
Edit:
I tried to make the dirt wall look less like a drop into the void. Also touched the trees up further.
Thanks for the feedback everyone!