I think this photo shows a lot of potential. Aside from the previous comments, I (personal bias) would like to see the horizon line in the center. The lower 1/8 or so of the image is murky--it weighs the picture down. Crop it out?
I like the interplay between the atmosphere (clouds, vapor, sky) and the canyon. Both elements are strong and that is what creates tension. And that tension is what draws me into the photo.