Looks great but maybe reduce the contrast a tiny bit, just to soften slightly the colour difference.
The last picture looks nice but i couldnt put my finger on what it was that seemed out, then i realised straight away.

Its the water!! at the moment it matches the crazy luminous stock landscape, plus the game engine for some bizzare reason does the opposite of reality and lightens textures with distance rather than darken them, but you wont be able to change that.

Water here in the UK has a brown type colour especially the English channel,


most inland water ways are a very similar greeny brown colour because of the sand and silt.



If you could try to emulate those colour i think with your current textures it would maximize the effect beyond belief.

EDIT# Sorry but i just realised there's some dirty bastard letting his dog shit on the grass