I agree. If the author himself is telling people it's not ready for production, it doesn't really matter what bugs this code has, unless it affects other subsystems or is a dangerous regression from the previous stable release.
If the bug it's fixing was already in the current release branch, wasn't noticed before and has only shown up now late in the stable branch lifetime, then it definitely doesn't seem like something that needs an urgent fix.
Considering that Kent himself warns against general use right now, I don't quite see the urgency to get the bug fixes out - in my understanding Linus would happily merge them in the next development kernel. And whoever is set to to run bcachefs right now, might also be happy to run a dev kernel.