This looks really fantastic! But since I'm a passionate nitpicker as well, I think Nils is right. The lack of splashes was the first thing, that came into my mind.
And this is really a tough one. I could imagine using small localised clouds with low quality settings, but I don't think, this would really look convincing.
Maybe I'm wrong, but I think I remember some water splash meshes somewhere, but I'm not sure.