You could try a PF masked fractal warp for some 'erosion' (or real erosion of course), but keep the smallest scale of the PF a bit in the meter size. And add some more veggies to the bare grass, especially on the opposite shores and hills.
What is the black thing on the rock? I do like the front rounded terrain, almost looks like smooth rock, so you could also make that pure rock, add some real voronoi (and warped) cracks (blue node setup), and have some bushes and grass grow in those cracks. Bare smooth rock with lichen on it, I can see it.