I like the image, its got the rugged look of wales and the lights good. Exposure wise, nothing looks clipped or blocked. The constrast is very strong, its rare to say its got too much contrast but I might have not have added as much, or just lifted the shadows ever so slightly. I know you've wanted to include the heavy clouds at the top but I think the image is improved without the dark heavy band of clouds of at the top, and it feels more balanced. I think a slight, and I mean a slight reduction in contrast, or a slight, and I mean slight lift of the shadows and then that crop, and you'd have a master piece there.