Nice view. Your sky seems to be somewhat overexposed and has lost the details in the clouds. With this rule set, you could have combined 2 shot with different exposures to avoid that and still get the detail in the valley. One shot would be exposed for the light levels of the sky and the second shot for the light levels in the valley. (Just a suggestion)
A nice shot of the valley, but all the focus is in the tree on the left. I don't know how colourful the original scene was, but that colour wasn't really captured here.
You have a nice scene to photograph. There ae good repeating lines and shapes. I would suggest a graduated ND filter to help hold detail in the sky and avoid some of the burnout.
I think the subject matter is great, the sky is kind of blown out, I think a graduated ND filter would have been great here, It would have added more drama to the great clouds and and would have allowed more highlights of the ground. Very nice photo though.