I guess by "high quality" you are referring to speed and weather sealing. Otherwise, the EOS R produces "high quality" images.The most important feature for a new camera to me these days is the flip screen. Nothing has improved my photography more so than that. I'm not a fan of the flip to the side Canon version for the things I use it for. Would much prefer it to just tilt out to stay in line with the lens but regardless the R5 will be killer because it will be the first high quality Canon camera with a flip screen. If the 1DXIII had a flip screen I may have bought that camera to use its excellent LV system.
Or maybe you mean price?
In any event, yes, a welcome feature.