This is getting much nicer than your initial setup! There are a few things that I would change though;
Some ripples/wavelets in the water up front. More detail in front really makes it get depth and reality.
Less consistent voronoi displacement in the rocks (or broken up by a fractal warp).
Maybe some fresh snow on higher slopes to get rid of the dotty appearance.
Slighly more color into the overall very black rocks, or add some lichen or whatever is found in Iceland ion rocks.
Try to sinks the boats into wet sand (by simple shape+ displ+ reflective shader)
Use other stars; try Martin's setup, which is more subtle.
That's my humble opinion anyway, it's no law