DXO mark: can be useful in looking at performance across different apertures. Trash quality reporting for headline news, and ‘perceptual megapixels’ largely a waste of time, but sounds very convincing for newcomers.
From personal experience with this camera and some of these lenses, and listening to other users of the D800E, I would say it is 5-10% sharper than the D800 when used with the best lenses.
But Sharpness is great almost across the board these days, especially compared to any previous generation of photography, and when you consider that the vast majority of shots never get seen on anything larger than Facebook, and it is not the factor that really makes your work better, just one part of a lenses quality, and a small part of overall photo quality. If you are going to get everything else right, then sure why not have outstandingly sharp lenses, but get composition, concept, execution and the other important factors right first.
Started out doing photography at the age of 6 using an uncle's old 1940 kodak brownie box camera. At 15 years of age, I decided to buy my very own 1975 Praktica SLR camera. I now shoot with a Nikon D850. I do unpaid TFP and commercial paid work.