I'm glad to see that they've figured out how to make the lens extend at 70mm rather than 24mm. That is my only real complaint about the Mk1 version.
In terms of good copies of things, how far 'out of focus' does a lens have to be to deem it poor? I'd be keen to see a sample so I could compare my own copy.
Actually, the reverse zoom design was one of the nice features of the 24-70, IMO - it means the lens hood is effective throughout the focal range, instead of at the wide end only.
One of the optical issues with the original is field curvature, hopefully not present in the MkII design.