I tend to agree with most your points except D800 frame rate is really inadequate to take advantage of an enhance AF for action shots of any kind of subject. But then we have the lower resolution D4 to blow away all these cameras we have been discussing, (at a somewhat significant cost differential! ).
Since I came from a D200 to a D600, I had to deal with the ergonomics issue - after all, the D800 is a 3rd iteration of that basic design.
I admit at first I felt I had taken a step back in that regard, until I started to really shoot the D600. All that ergonomic stuff fell away for me. I find the D600 logical and well laid out in it's own way and I can do my day-to-day stuff without getting into a single menu and the camera up to my eye.
Just a perspective,
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