I'm a little afraid to insert here. There are SO many threads on the subjectS of D800 focus. (and I have the problem with my $3,000) I'm afraid I may be outside the current thread subject, which seems to have been split between focus issues and other failures by Nikon service.
HOWEVER, in various threads on the subject, I see comments to the effect, "I never use the left focus point," which also suggests, just maybe, "Why are you all so upset about that outlier focus point? Nobody uses it! That's too much to expect of Nikon to make that thing way out there perform just like the one in the middle!" (And I understand that there is a technical difference between the middle and outer focus points -- but the bottom line is, they are both expected to 'FOCUS' dammit! Otherwise they wouldn't be there).
Well, just do a vertical head and shoulders at f1.8 or 2.8, from a POV of above or below the model, and you'll see that focus point right on top of the eye you want in crisp, sharp focus. Now do you worry about that "outlier" focus point?
If Nikon says, "The left-most and right-most focus points are not as reliable as the more central focus points," then I would accept the current issue. But Nikon won't say that. And, apparently, they have made SOME cameras conform to expectations for all focus points.
I understand the mechanical and optical challenges in this issue. The real point is: Has Nikon solved those issues, or haven't they? They are advertising as if they had, or at least are not signaling that they really haven't. It's time for either: Full disclosure that the problem really exists and that they don't have a solution; or that they do have a solution and all D800 users can expect that if they send a camera in for correction it will be repaired within specs.
Neither seems to be the case at this point --- shame on Nikon (which I know the forum managers don't like to hear).
And I might add: I've been in the camera and electronics/computer/software business for for 56 years, and a Nikon owner since 1957. I thoroughly understand the challenges Nikon is dealing with. However, if Nikon is advertising that they have solved those challenges (simply by providing all those focus points without warning that they might not really work as suggested), then they must deliver, or shut up and remove the focus points from the camera (since they are useless, in fact dangerous, if they don't work).