I chose Canon as my camera system because of their glass. Canon invented the USM focusing system in 1987, others copied. Personally, I like Canon L glass for the color rendition, having had the T2i Rebel (550D), 7D, and 5D2 bodies (like many other here) I enjoyed the evolution, especially using lenses like the EF 70-200 and 24-70 f2.8 mark 1. Sharpness and OOF backgrounds seemed less important characteristics when compared to the colors SOOC. Briefly, I flirted with Sony - I purchased the A73 with Zeiss glass etc. My images were tack sharp albeit all with a blue-green hue, I missed the Canon colors! When the R5 came out I got one as soon as I was able to and have not looked back. It is light years ahead of the legendary 5D2.
When the R5II is launched, I will get one. In fact, I have been stashing cash (literally in books, drawers etc.) in anticipation. I may keep my existing R5 as a 2nd body or I may sell it, but I have half a dozen L lenses that are going nowhere. Whatever new features the R5II will bring, I am sure that there will be significant improvements to the current model. Double CF Express type B, eye-AF, better stacked BSI sensor with faster readout and improved rolling shutter (as a consequence), possibly improved DR, AF (modes for different types of animals/objects etc), incremental gains to low-light performance and video modes (perhaps even codecs - the Z8 shoots Apple ProRes internally), FPS and so on.
No doubt, whatever the improvements, some people will complain. When you used to process negatives and hang them from the shower curtain rail to dry and used a reducer/enlarger to expose your negatives onto 5 by 7 inch photo paper in total darkness, using a test-strip and counting aloud: 1001, 1002...1012, to later determine which exposure band looks best, all so you can repeat the process again to get your final print, then you are so thankful for Capture One or Lightroom to play with digital negatives (RAW files). Canon spoil us all nowadays. When global shutters are ubiquitous, I'm confident that Canon bodies of the future will have them too. Until then, just enjoy your camera system and take pictures every day (if you can). My 2 cents.