Forget the R1, they need to get these lenses out for the C400.
I see a lot of confusion in the comments from photographers about these lenses, but for videographers they are truly astonishing. Sure, some people might complain about the weight, but actual cinema lenses are much heavier and with far fewer features. Nothing compares to these Z lenses at this price point for R series cameras.
Regarding the servo zoom, this is the exact same piece of kit that came with the 18-80mm CN-E lens except that it is now easily detachable. If people are trying to use it without a 20 pin zoom rocker then they are using it wrong. The base model is pointless unless there is some sort of remote control kit that allows it to be controlled in the future without a 20 pin port. The zoom does appear to be slower that would be desired for crash zooms, but that might either be a power issue or due to the fact that these z lenses have a problem with distortion correction with crash zooms.
Anyway, Canon really needs to release these Z lenses sooner rather than later.