spkerer wrote in post #6965106
I got a new 24-70L f/2.8 in late November. Got in back from Canon service around Dec. 16 and I'm currently waiting for the shipping labels to send it to them for another try. I tried all sorts of things (tripods, timer, different bodies, etc.) and it's just plain not good.
I'm going to keep having them fix the lens until it works acceptable. In my opinion, those shots you posted are NOT acceptable.
Good luck !
My gear is there for the 4th time this year ! They always do something either to the lens or to the camera but the issue never goes away. ( to sceptics that think I do not know how to test focus, Canon guys confirm the issue )
This time something weird is going on. I sent it 4 weeks ago and besides a delivery confirmation from UPS I do not have anything from Canon. I tried to call and the customer support says my gear is somewhere at customer relationship department and they have no control over it. Customer relationship points to the service department 
And yes I was left without gear over Christmas and spent my extremely rare vacation at Lake Tahoe without the camera. Not sure what I can do now.