Thanks to everybody for the comments and feedback, I really appreicate it. I hadn't really considered that the right-most rock outcropping could be a distraction, but now I see your point, particularly given its proximity to the edge of the frame. Cloning out a permanent feature of the landscape such as that isn't something I'd do, but I'll have to go back to the original stitch and see if I have room to crop it out or at least get it away from the edge of the frame without throwing off the balance of the image.
I do have another shot that's framed more loosely, and I think it's less of an issue here; but the light wasn't as good on this image IMHO, also from this vantage point the mounts aren't visible behind Shiprock (once again, click on the image for a larger version):