Dave, very nice, but I too would like a little more contrast, with the blacks pulled down and the mids up a little. But I love gloom more than shadow detail, and it's YOUR pic!
Love the shot, love the comp. the colour's need a bit of a boost through contrast and curves....and also, next time a weak ND grad filter might have brought that sky in a bit more...Still a very sweet pano!!
This is very well done David. I love contrast and can see why others are suggesting adjust it or the curve related to the black point. Having been in the desert, this looks correct.