I agree with most said, but mostly with the fact that the waterfall is too simple. If you have your terrain quite complete you can draw in a painted shader (brush suitably decreased, and preview frozen), following cracks and lowest areas for a more realistic fall. Indeed not covering everything, as if the water streams under or behind rocks and crevices.
I would also like to see more diversity in the grasses, some dried out parts (population variation and/or different species).
Otherwise, when viewed for the first time, it seemed very photographic and rich in detail.