The sky, the hills .. wonderful! The only problem I see, and since you are only 1/3 finished I bet this "problem" will go away.. is the front lawn. The horizon line is too harsh, but once you get the tree and the fence and other details in it will tone it down. Is that what is bothering you about it? Your final embellishments will definitely smooth it out and make it flow.
Your fabric choices are awesome.. love the roof and the walkway and the stone fence. Remember, as you said, you still have 2/3 of it to go!
I think you will love it when finished!