I know what you mean. But when you hit the sweet spot where everything works together, it's magical!
The detail level is looking pretty close to correct. The trees still look like plastic to me. Check this out:
Notice that although the lit parts are brighter than the shadowed parts, they're all still green. You'll definitely see a white reflection if you are looking at an individual leaf, but you don't see that same effect when you look at the entire tree. Much more the less so when you see an entire forest.
Are you using the same light direction for the mountain as you are for everything else? It looks to me as though the mountain is lit from the right and everything else from the upper left. It's hard to tell exactly due to the complexity of the mountain's texture.