There's nothing handicapping the 7DII in the tests, Marsu42. My 60D is sharper than what is shown, and you can see that for yourself if you choose the 60D as the body in several comparisons.
The 7DII is not being cropped in any strange way. It is a straight test of sharpness, of how the lens is resolving a test chart, and the 7DII with the ef 100-400mm II, a theoretical "dream team," is having some kind of trouble in this instance.
Arthur Morris deals with some pretty experienced enthusiasts, yet he dismisses their claims as user error. Are you saying that Brian at the-digital-picture set up his tests incorrectly?
The whole crop vs ff issue doesn't come into play here.
The first question I ask in these cases is whether there are people out there who are getting the expected results from this camera. If the answer is yes, then we know (fairly conclusively) that it's not a design/engineering problem. At that point there are two main possibilities: quality control (i.e. manufacturing variability) and user error.
Go hit the web again; this time, look for satisfied pros/advanced enthusiasts who don't have a business relationship with Canon. If they're happy, you need to look beyond design flaws.
I consider your opinion reasonable and logical. I do however have enough evidence to support the performance issues of the 7Dii.
I take you back to Scott Kelby's hour long video where he highlights the superb performance of the 7Dii at two American football matches. Shots looked amazing, for both sharpness DNS noise performance.
There's other videos of Canon pros who intimate that although not identical, the 7Dii's performance is very near to that of the 1DX.
So we've all probably seen those and more videos.
Thing is, when I sit with owners of the 1DX, both professionals (international event sport photography) and serious birders, who cannot get decent performance from the 7Dii, I worry.
I am talking about seriously good photographers here.
Aside from AF and shsrpness issues, there's also this extremely weird 'work one day, next day not' phenomenon. Set your camera up, take good shots. Go to the exact same place with similar conditions and then the camera behaved very differently.
I can't grip that.
We also talk about the vast number of people who are not complaining and I can tell you something there too...most of the regular buyers do not know how to benchmark whether an image is sharp or not.
I'm a photographer/birder, meaning I strive for photographic excellence in my shots. There's also birder photographers, who are more keen on proof shots. It seems they're less worried about perfect photographs.
I'm hoping and praying that Canon fix this or I may end up selling my 7Dii.
Absolutely nothing worse than having a camera one does not trust implicitly.