> Be grateful for any suggestions on attached view
My suggestion is: Frame it and don't mess with it. What you have here is a composition that works, of a scene with a single coherent emotional message, expressed in a limited pallet of colours that work well together. What's you don't have is either
a) a ruggedly handsome guy leaning against the boulder in fisherman's garb, inhaling a Camel cigarette with restrained but heartfelt relish, or
b) a bird of prey swooping down on a trout(?) that just happens to be jumping out of the water at that instant, or
c) a glorious Technicolor sunset with a shaft of light illuminating the heart of the scene.
Fortunately, none of these clichéd elements are present, so we can relax and enjoy the scene with fresh eyes.
As a technical note, if you hadn't mentioned the ND grad I would have guessed HDR to recover the rocky foreground.