I like the cleanliness and light of the render, so I would concentrate on the stones. A little offset may help indeed, but you could also try some fractal warp (small sizes) on the stones to offset the straight edges. Also, there's an ugly stone in front. Either mask that out by a simple shape at that location, or hit seed. Or put a log across or something.
Furthermore, I would only use the RT reflection for the lower wet part of the stones, so put it on a surface shader and set a max altitude and small fuzzy zone. Have that preceded by a non-RT reflective shader, so the tops are wet, but not very wet.