If you manual focus in Live View, then the focus shift is irrelevant.On the other hand, I cannot imagine a situation where I set the aperture AFTER focusing, so I don't see a big issue here.
Unless you're shooting wide open or focusing manually with the DoF Preview button pressed, you're stopping down after focusing every time you shoot. AF is always performed with the lens wide open, regardless of the aperture selected. The lens stops down just before the shot, and that's when focus shift occurs.
Do you see a bigger issue now?
It's a deal breaker for me. I have zero interest in a lens with focus shift problems.