"like a setting that is still waiting (for a) subject"
I think this is spot on. Birds, a tree, dramatic clouds, something. But there is no subject or "why" to this photo. Pretty area. Well technically executed, but the subject is missing. This isn't at all diminishing what you have done, but having you raise the bar.
Another thing missing is an element to give it scale. It is a hill... ok. I know that area, so I know how big it is. But an outsider who has no context for this shot is left looking at it going 'ok... a hill... whats so special about it'. Is is big? Far away? People, structures, other objects like birds in flight, something would improve this.
There is a poster here that has inserted birds into her shots. It does two things. It add scale, and motion. That is the last element that could add depth to your shot. Moving water, skies, birds... what ever. It adds life to a shot. That is why sea shore shots are often done with slow shutter speeds - not because it is dark, but it adds motion to the shot.
Hope this helps. It is just my opinion - and you may like it as it... and that is fine.