i think the picture is abit too cluttered. i believe you want to give a sense and serenity to your picture, so clutterness destroys it.
i suggest a potrait shot of the right tree only. this allows the silloute of the tree to be a sole subject, and it also allows the top of the photo to have more sky, giving a sense of both isolation and space respectively.
if you want to keep the same composition, a second suggestion would be placing a distinct subject of interest in the center. imagine a siloutte of a deer in the center, it definitely gives more interest to the photo. but since deers dun pop out on demand, you could have place something there yourself, or even just stand there yourself(setting the camera on self-timer).
hope this helps. oh, and becareful of the tilted horizon, was it done on purpose?