Hey John,
you got pretty good DOF for f2.8! Nice use of color as a leading line. I also like the contrast of colors. I will ask........did you try bringing up the whites a bit???........not sure if it will improve any........but it may improve the texture in the reddish rocks even more. I like the flow of this.
I like the composition and the colors but want more contrast. I tried a local contrast enhancement using USM at 20/50/0 and then sharpened the image more using USM at 125/0.2/0 three times. The middle is very sharp the the top and bottom are soft. Since you were on a tripod, a smaller f/stop could have been used for a better DOF.