I haven't used the 7D2 yet, but I hear echos of when the 7D came out. Folk wowed by the specs and then underwhelmed by the images.+1
I got my 7D around 6 months after launch (let the beta testers break theirs first, save a third) and I quickly came to the conclusion that those not getting decent AF hadn't bothered setting up the AF system, particularly the Ai Servo preferences, and those who were getting too much noise were either shooting jpeg or messing up their RAW workflow.
I was, and remain happy with results up to 3200 with careful post processing, but as with all APS-C cameras, the lower the ISO the better.
I wonder how many people buy something like the 7D or 7D2 and expect it to work brilliantly out of the box?
Thats what the 70D class of camera is for, and would probably suit reviewers like Ron a bit better.
I was about 4 weeks in having shot speedway, soccer etc before I had my 7D tuned to work in line with my shooting methods. It wasn't a frustrating experience as I could feel the keeper rate improving and the camera getting better and better at tracking.
The headline spec changes of the 7D2 aren't enough to tempt me just yet. Besides I want to see what Canon come up with in terms of 4K.
When I first got my hands on the 7D2, I had a poor keeper rate due to autofocus problems..... The more I use it, the better the rate gets. I can do stuff now that the old camera could not handle, and I am still learning.