No one who has shot on a c200 cares about the 4:2:0 at all.
The other important thing about the c200 is that you don't need to be a colorist/DIT to work with the log in post, you can just add saturation and contrast and call it a day if you want. Not many other cameras can do that, definitely not BM or Sony. Those cameras are just as good, but you need to know more about how to work with colors in post.
Whether they can cut together is an exposure range question. If you want the MP4 to cut with the RAW, your exposure range needs to be pretty small. The wider it gets, the more information is captured in the bottom 3 stops for the 8 bit stuff and the more you'll start to see a difference. 8 bit only has 8 stops of dynamic range, 12 bit has 12 stops of dynamic range.
For the 4444 vs 422 stuff its a matter up whether or not you will lift your footage in post. If you ever plan to 4444 is much better. If you nail exposure and don't really adjust it up in post it won't kill you to do 422
No middle codec needed, screw 10 bit
The RAW is way better than the 8 bit. The big difference is that the raw is 12 bit color. The detail in the darks is far far better. Black hair has no detail on the 8 bit, but on the 12 you get full detail. 8 bit will always suffer showing colors in the bottom 3-4 stops of DR. 12 bit you will have 2x3 times the information there. Thats the big difference between the two.
The best indie workflow for this camera is to shoot RAW with the correct white balance and iso and then transcode to prores 4444 12 bit and delete the masters. Theres very little benefit to the RAW, you just want the 12 bit. At the end of the day RAW is 444 sampling anyhoo.
Lastly, for the first time canon has one rec 709 lut for the camera and it looks good in most situations. Arri's been doing that for a decade and everybody loves it. Finally other manufacturers are realizes people don't want choice on that front.
It’s just when you can tell the difference, there isn’t any rule.
When you have so many titles, you should not play dumb, It just affirms what people assume.