What this guy said.
I normally test with still objects or parts of the scenery - signs, patterns, buildings, desk items. It erases the variation in movement. As basic as it gets. The unit was a dud. No big deal, but it would have been a big problem for the canceled shoot.
I havent posted the pictures of the af errors because im not out to attack a camera, thats pointless.
However at some point ill post some 7d2 long exposure images (spot AF point) along with the 6d comparisons. They wont be anything surprising to those that do FF night photography.
The unit could only be "dud" because you didn't have enough experience to use the complex AF system as is found back in 5D3, 1Dx or 7D2. It's not because you use a 6D that you can handle the AF of the 7D2.
And yes your are attacking the camera by mentioning that "The Af on my 6d is spotty at best, but even that beat the pants of the 7d2 tester I had" just after using this 7D2 for a very short period and that without specific knowledge in AF of such a system.
For sure the FF 6D camera will get better results for long exposure images. But this is caused by the FF sensor inside, not the AF. Even for a long exposure I always use a remote control, and focus manually. But according to you this is then a AF problem of the 7D2.
I don't really understand what you want to tell us, but as mentioned here several times, most of the AF problems where people talk about are caused by the user, and not the camera. I know what my camera can do, and how it reacts, and this is based on the fact I own such a camera, not by testing it quickly and telling such things on internet.
I think your signature tells us everything of yourself "Be the best you, screw everything else"
How much experience does a person need with the 7D II to shoot in single point, single shot AF mode at stationary objects? That is about as basic as it gets.
Not sure, but at least he need to use the correct mode and point or move the selected AF point on the subject he want to focus on.
For example, a compact camera user just need to point the camera at the subject, see the subject in the camera LCD screen and take a shot, but when he got the 7D2 and try to do the same in Av or Tv mode, he might get 90% of the shot out of focus and he conclude that the 7D2 had focusing issue.
For example, an analog phone user just need to pick up the phone, hear the dial tone and dial in the phone number, but when he got the iPhone and didn't see the dial pad and he conclude that the iPhone had an issue and not usable.
Anyway, what simple and obvious to you doesn't mean it's simple and obvious to everyone... usually more advance system need more knowledge to operate properly even basic task as it's usually provide more controls over the simpler system.
Have a nice day.