PZ, at least in the RF-S lens, is not a zoom-by-wire like Canon RF lenses are focus-by-wire – no freely rotating ring. The RF-S 14-30 does not have a normal zoom control with an added motor, the 'zoom ring' is a rocker switch in the form of a ring. I suppose one would get used to it...
Maybe the RF L PZ lens will have a different design than the current RF-S PZ lens. It's certainly possible to have a freely rotating ring coupled to the zoom motor, my Vixia HF G60 camcorder has a freely rotating, knurled ring in front that can be used for focus or zoom (controlled by a switch next to the ring).
View attachment 229042
The implementation is not ideal, IMO, but better than the two-speed rocker on the RF-S 14-30. The zoom speed varies with ring rotation speed, but there's a short but still noticeable lag between when I start turning the ring and when the zooming starts. For example, I can give the ring a very quick, short rotation and then the camcorder gives a short, quick zoom that happens
after I stopped rotating the ring. The process just feels a bit imprecise. Personally, I use the ring for manual focusing and stick to the rocker on top for zooming.
Fast zooming does not seem very desirable for videography, whereas you may want to zoom in quickly to take a picture. Might matter less with a 2.5x zoom range in the ultrawide-to-normal range.