I don't know if it just a lack of trying, or if there is really some deeper issue. I could imagine, for example, that the high-spec screens on the new Nikons, for example, are prohibitively expensive in small production numbers. I don't know though.
Tim, do the Max and TC give you everything in your requirements-list from earlier? Suddenly two cameras, plus the G1/M8, lenses, and so on, and still no tilt/swing, unless 6 degrees with an extra adapter floats your boat, and no proper way of getting the correct focus (sufficient DoF does not give the same sharpness as proper focus). Are you letting the sexy specs drive your needs?