I so far hesitated to upgrade from my quite big selection of EF lenses, but the next generation in this fast standard zoom section may make the difference. I really want to upgrade from my old 2.8/24-70mm. But besides offering 24mm instead of 28mm, Canon should solve the noise problem of the AF when shooting video with external microphone, since this is also a typical video lens range. A review by Steve Huff (
https://www.stevehuffphoto.com/2019/02/11/the-best-canon-lens-ever-made-the-28-70-f2-rf-lens-review) of the 28-70 alarmed me some years ago, because I was always annoyed about the noise made by the "classic" USM drives on video takes with an external mike. In fact that noise problem drove me to buy an additional EF 24-105mm f/3.5-5.6 with a silent STM motor for video purposes only, and that relatively cheap zoom suffers from heavy pincushion distortion at the wide end.