I think the less detailed version worked better with the style especially since the grass and the road are just flat colors too. You should just put such detail into the objects which should be in the foreground (such as the trees)
I agree.. I think foliage suit better with rock texture..
Here is little update:: New grass, Flower, Stone texture have now much more detail than before. Critic is always welcome.

Its lovely the way you did it and the color usage on the grass, but it doesn't fit the style of the rest of the piece

it looks like
manupix's style.
I would go for something more like
this, but don't over use it, just add this grass efect in some places, near trees and whenever you feel like the floor is too empty.
BTW, IMO you should finish all of your ideas instead of posting all the progress and lots of pieces @ PJ. I think you should add a character somewhere. In that mood I would do a character sleeping by the tree or something

.
I like it a lot, nice improvement.
for some reason it looks like the borders work on the rocks but not on the trees, probably because the trees seem to be more circunferencial and near the borders its already dark and it doesnt add contrast at all, and the rocks do not, the contrast on the tree is good; and I think you don't need any border on them, try to add the same effects to the rocks maybe :p.