Interesting to note, looking at full specs, 14-bit is limited to 8 FPS, above that goes to 13-bit, and I believe it's safe to assume silent shooting is 12-bit. It says, when setting the camera to "high+" it is immediately 13-bit.
Not a real issue above ISO 100, since I'm sure the dynamic range very quickly falls below the limit of 13-bit around ISO 800 like most cameras, and then even faster falls below 12-bit. I don't see that as an issue to me as most of my action where I'd need 12 FPS is around or above ISO 800, but I'll probably just default to 8 FPS for general shooting, and switch to high+ if the action warrants it. 8 FPS is still faster than the 5D mark IV, so that's a plus to me, and I surely can't complain about having the option to do 12 or 20 fps.
Also, anti-flicker is limited to 6.2 fps, which isn't far off the 5D Mark IV's 6.6 fps with anti-flicker, so this will also probably be another setting I'm more intentional with as well. This on its own probably means I'll still use my 1DX2 as a primary camera for night sports, since it can anti-flicker at 10-ish fps, and 10 fps is kinda my floor for sports.
Overall though this has all solidified my choice to replace my 5D mark III with the R5, since even in worst conditions it's a far improvement in all fields over my 5D mark III.
That said, I do hope that the EOS-R1 they eventually release can match 14-bit at 16 FPS. I also hope an R1 has the shutter timing fine-tuning that the A9II has, so that it could anti-flicker at 20 fps, which would be totally killer. If Canon could add shutter timing fine-tuning to the R5 in a firmware update at some point, that would also make me super, super happy.