Very nice already, indeed. I don't mind the hill in the back, just leave as is. You are right about the other points. Depending on how you made the path (Simple shape?), you can add some tracks, or just random holes and ridges with a power fractal. Then you could either use less stones, and more varied in size, but with a more pathlike texture on the path (greyish, sandy), or throw in a lot of stones and make it a complete gravel path. Perhaps with some larger stones near the edges. Add some power fractals (no displacement) across the stones for more diversity in color, but keep the colors subdued. If you add a power fractal after the stones with a subtle displacement (but no color) you can vary stone size too, but play it carefully.
For real godrays you have to check shadows by surface in the cloud node, but it renders slower.