It's a tough question, James. You almost have to be there to know the possibilities/challenges, I suppose. Is it too much? In the sense that it tries to get those angles as well as the soft layering of the fading horizon, and the green patches in the frame, maybe yes. The second question (what to do differently?) is more complex. My approach, taken from a mentor, is to "compose what you want in the frame and eliminate all else". With that in mind, here are two options, neither of which is all that impressive, but they do take away the distractions to the sweeping lines you want to show.
http://www.pbase.com/rickards/image/95413737.jpghttp://www.pbase.com/rickards/image/95413740.jpgWhat each of these do, is to stop the feature dune from being the subject. The subject becomes the complex lines of the many dunes.
