I love how there are so many different textures to the clouds throughout the sky. The colors are beautiful too, and the song reflects the photo wonderfully. I have to agree with you about the tree, I think it adds enough asymmetry to the photo to save it from boring perfection.
I'm not sure how you could have, but I think if the picture was framed a little differently as to not have the big smeary cloud in the corner I would like it more. its still a really great picture though.
May have cropped out most of the sky on top (the really soft part) and possibly moved over about a foot before I took the picture to remove the tree from the shot.
Going with the rock silhouette was a good choice, but I think the bush/tree on the left should either not be there, or be more prominent in the shot. As it is, it seems like a bit of a distraction.
Beautiful colors. I'd like if the branches on the left were closer to the camera and included more or if they were not in the picture at all, as they are I find them a little distracting.