Wow, what an awesome image
See you had to limit some quality settings to get manageable rendertimes, isn't it? (how long did it take?)
I really like the lighting on the rocks and the textures worked out pretty well.
Maybe you could add a powerfractal shader on top of the fakestones shader part of the network, just to add some small scale displacement without applying colour.
(like scale about 0,02, lead in 0,2 and min. 0,002...displacement factor very low at 0,07 or something)
I think this could add some interesting extra texture and detail to your rocks, making it even more realistic
Just an enthusiastic philosophy
The pov is indeed very good, couldn't be better.
Great work!
Martin