I also sometimes get buffering problems when shooting a series of short 1 second 20fps bursts on the R5. Not sure what you mean when you say "that pause is very strange" - my R5 just completely locks up, and the only way to get it going again is to drop the battery and reboot. Fortunately it doesn't happen very often. The problem isn't restricted to the R5 either - I've got a friend who has exactly the same issue with his Z9.
John has some good points (as an engineer I like the log scale), but I fear that the current scaling is too ingrained in most people.
For the use cases you mention, an R5 is a lower cost option that sacrifices little to nothing (And I say that one who shoots with both an R3 and an R5).Getting an R1 or an R3 (and it will either be one or the other) really depends on whether I want to move to a single-body camera solution or not. I currently shoot with a pair of EOS RPs for events, theatre photos, and weddings, and while it would be a major change to go from 2 low-end bodies with fast primes to a high-end body with a fast zoom (like the 28-70), I might be willing to do it. That setup would probably cost me 10K, though, even after selling my old gear.
I moved from an 1DX to the R3. It's damn fast, but I'm still strugglig to learn how to take advantage of all the improvements. Getting there is definitely a journey.So about 12-18 month until I could get R1.... makes me wonder if I should get R3 to replace my 1DX.
For the use cases you mention, an R5 is a lower cost option that sacrifices little to nothing (And I say that one who shoots with both an R3 and an R5).