Any thoughts on how to improve this pic?
Oh, well, I can never resist an invitation to tweak an image. So, here goes:
I think the composition is great but I would crop away the image from just below the white rocks at the base of the fence. I would clone away the white rocks and the white branch by the tower base because I find them distracting and I would darken the base of the fence and the right edge of the image.
For reasons that don't exist in reality (when you measure), the wind turbine tower seems to lean in and I would gently tilt the image clockwise to correct this.
Then I would get some real blacks into the sky. I would darken the top right corner and the dark areas at the top left corner and the left edge. This suggestion is based on how your image looks on my monitor. There may, in fact, be plenty of black in the sky but the effect I would try for is to get the same strength of black in the sky as there is in the bush at right edge beside the tower.
I would make the turbine blades stand out more by lightening those in the top left quadrant. I would clone away some odd fluffs of white in the dark areas of the sky.
Then you would end up with something like the version I have attached . . . and decide it's overcooked and trash it!
Roger