Sorry to say, but actual lens sharpness has nothing to see with AFMA. AFMA is to calibrate the precision of the AF camera / lens combination. If a lens is not sharp in AF mode, it's because of the camera / lens combination, it says nothing about the real sharpness of the lens, though it will of course give a sharper image in AF mode when the AFMA is properly adjusted.
A lens can be extremely sharp and show poor results because of a bad AF adjustment, but the same lens focused manually will show perfect results (unless defective). If you want to compare lens sharpness, the only way is a solid tripod, a powerful steady light source (or flash) and manual focusing with x10 magnification on live view. If you test your lens in AF, you test the AF ability with one specific lens, not the optical sharpness of the lens.