I read the updates to the review. I don't think they're unfair on the nitpicks on the AF not being sticky at times, the video crop washing away 4K detail or JPEG defaults washing away detail in the RAWs. Had a shot completely blown out shot from my recent fun with the Rokinon 50mm, which, Adobe LR (with the M50 profile) saved. Operator error on my behalf, but you'd be hard pressed to know it was a highlight save. Likewise, there's a bunch of detail in those RAWs otherwise that do not make it to the JPEGs in terms of Dynamic range which I also had some fun with in LR.
The only point I might disagree with is it not being for sports shooters due to AF. I think DPR didn't spend a lot of time with adapted lenses on this camera that sport either the fabulous nano-USM of the 70-300 IS II USM that Canon covertly recommends for this camera, or any of the great whites with standard USM motors just based off the samples gallery. The AF is killer with a USM motor mounted. But, where I'll agree with the general point about sports being less than ideal is even with fast UHS-II, in 7FPS tracking priority mode, and C-RAW, the buffer still fills pretty quick making it less suitable than say the A6400-A6600 which they're comparing for AF use alone. I'll say based off buffer, they're right.
However some context is necessary as the M6 Mark II is leaps and bounds superior in the Canon realm here though... If you're say comparing it against say a 7D or XXD series like the 80D where the RAW buffer tops out at 24-26 frames, the 42 frames of CRAW of the M6 Mark II is huge. As is the Fuji X-T3 which tops out at 36 frames of RAW. The 1DX Mark II tops it at unlimited RAW (till card fill) and A6500 tops out at 110 frames or RAW buffer. Now, one could counterargue that CRAW is cheating (it's 26 frames of standard RAW otherwise), but, then again the X-T3 doesn't offer CRAW, only full RAW or less resolution RAW so that point is debatable which I'll say the M6 Mark II "wins" because CRAW is a better option as you loose a not measurable amount of post processing ability vs loosing any resolution of the Fuji for example.
Overall I have to agree with their review, not because it's positive, but because it's not misrepresenting the product.
Canon needs more glass though, which is something I suspect Sigma will have to do for us as Canon doesn't want the EF-M eating the RF mounts lunch. Sigma on the other hand will though