Nice article.
The position of the off/on-switch is the biggest problem I found with canon. I realy cant understand why they won't put it around the shutter button. It works perfectly on Sony and Nikon. Its just the perfect spot. You can put it there for EVERY camera. There is no reason not to put it there. Its quickest to reach, you can reach it while taking your camera out of the bag with one hand. You. can reach it, without moving your hands away from "shooting" position (left hand under the lense, right hand at the shutter.) There is just NO reason at all to not put it there. plus, you safe a lot of space on the left top side.
Same goes for the video/photo switch. Why not put it on the left shoulder (where now sometimes the off/on-switch wastes a lot of space) for ALL cameras? I think this is the biggest inconsistency and I cant find any reason for this. On my R5 its even a button combination - why though, why? :-D
What was always a bit weird to me was the 1 series - coming from an 60D, 70D, 7D, 6D, 5D II, 5D III everything felt always the same. Than I got my first 1DX II and suddenly I felt like a total idiot :-D it was so different... same seams to be going on for the R3,...
And here its also the video/photo switch and the power switch which is so crazy inconsistent
Anyway, thats complaining on a high level, overall the ergonomics of my R5s is great, I like it. But coming from the 5D and 1D it was unecessary inconsistent x)