Do the algorithms which LR applies take into consideration the sharpness of the original image? This may be important since the D800 and D800E images are so much sharper than anything else.
The sharpening in the Detail panel is "normalized" based on the camera. I don't know if the D800 and D800E would be different. The output sharpening isn't dependent on the camera, it's v=based on the output size you choose and works with (applied on top of) the capture sharpening. I will say the presets were designed (by me) for optimal sharpening for cameras in the 16-24MP range. I would suggest testing them against what YOU can do on your own and modify the presets (or create your own) for your camera and subject matter.