The EOS R IMO was a placeholder that Canon can't replace fast enough so nothing to protect.
We already know this will be limited compared to the 1DXIII (no RAW in camera, no 5.5K, lower photography performance, no top display, less weather sealing, etc.) but none of those limitations would affect Clog, DR, or codec selection. I also don't see Canon offering IPB only; once again...Canon is playing catchup, and they have new sensors, new tech, and a new hunger to come out on top. Going all in will hopefully be the new Canon norm.
The best part is...none of the features I want will cut into their R5 (higher resolution, top EVF, better weather sealing, better video specs), the 1DX, or the RP/entry level replacement, let alone the cinema line.
It does until you think about the fact that Panasonic already has all of these features as does Sony and none of these features eat into R5 specs.