I would LOVE to see some proper landscape images at different stops to illustrate the point you are making.
I think that the extreme size of the images the D800 is manufacturing reveals these negative properties to a greater extent than an image create on a lower density camera. It not an issue with the camera ... but the flaws will be more evident ? does this make sense ?
Almost like a with great power (image resolution) comes great responsibility (great camera technique) thing ... hahaha. ___________________________________________________________
Reality is merely an illusion, albeit a very persistent one. - A. Einstein