The 24-70 f/2.8 really was the hot candidate for a major refresh, and the MkII sounds like a cracker.
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.
The only Canon item I've ever returned due to 'obviously' being a bad copy was my most recent and most expensive - the 5D Mark III.
5D Mark III, 40D, 1V. Bunch of strobes, lenses and other bits.
They're, their, there, it's, its, too, to, than, then, you're, your. One lens, two lenses, the lens's aperture.