That is the exact situation where AF issues with the 85 1.2 show up! Even then, my experience has been that it'll usually nail focus on the second attempt. Too slow for sports? Sure. So I'll just rent the 85 1.4 IS a few times a year when I need the AF speed. When I'm shooting at the track at night, every third of a stop counts.
I agree with you on the EVF vs OVF issue. I particularly think that an EVF absolutely sucks when used with tele lenses. It's actually pretty nice on wide angle. However I'm working on taking the video side of the business underwater right now and the R5 seems to be perfect for that. I'm honestly not willing to invest a couple grand in an underwater housing for the 5D IV due to its age at this point. I'd rather buy the latest and greatest camera available so I'll get many years of good use out of it. Plus let's face it, even with the C-LOG upgrade, the 5D IV's video capabilities are rather limited. Mostly by the absolutely horrible rolling shutter. Fingers crossed they'll address that issue on the R5!
The 17-40 has gotta be the only Canon EF wide angle L lens I've never used before. The 16-35 4.0 IS is nice for video, the 11-24 is in its own league, but definitely a niche product and the 16-35 2.8 has always been my bread and butter lens. Never got to trade any iteration of them in because they ended up being insurance claims by the time I upgraded. The only one that's still alive is my current 16-35 2.8 III and I just had a close call with that one days before everything went on lockdown: As I was getting on a boat in Thailand, I dropped the 5D IV with the 16-35 attached on a metal handle bar. Broke off the hood, but the lens itself is fine. Phew.
I've only shot a single football game before, have never covered soccer. I'd think a 35mm prime would probably be THE focal length to go for as far as crowds are concerned.
I've heard about the Canon 50 1.4 issue. Did you look into buying a 50mm 1.2? Why did you end up going with the Sigma 1.4 over the Canon 1.2? I rented the 50 1.2 once but kinda figured that it wasn't worth the price tag to me compared with my 50 1.8 STM. But if 50mm is your focal length, I'd argue the 50 1.2 is the one to go for.
I really can't wait, either! Was looking for some files a few days ago and checked my most recently used CF card. The files were dated March 25th. Boggles my mind that I haven't touched that camera in almost two months.