I've said it before on here:
The R series was rushed out the door. Canon puts together good products, so overall the R is a good camera. The control ring is brilliant, the feel of the camera is good, the lenses aside from the kit lens are spectacular (not that the kit lens is bad, it's just not as improved as you'd think it would be).
But the hardware driving everything is anemic, leading to video without chips fast enough to encode newer formats on the fly (leading to very watered down video), severely restrained autofocus modes when you want to take multiple shots fast, and lack of other features becoming standard in it's competition's price range like IBIS. (This feature requires processing to know how to adjust itself, and the chipset driving everything can't hump data fast enough).
I remember the rumors floating around on several sites that Canon was looking at using sony sensors in some new products. I'm actually wondering if they are considering using sony ARM chips that are used in multiple camera processing systems. These are built on smaller die technology and have faster throughput and processing. However it's just a programmable chip, which means it could still have Canon software running on them still. Both the chips canon uses now and the chips Sony makes for it's own (and other) cameras have the same reference ARM design at it's root. Sony's is just updated and on a smaller die process, which makes it faster.