This is a discussion topic for the following Common Issue:
You can discuss the problem and its solutions here, but please note that debugging and technical feedback should primarily go to the issue trackers (e.g. Bugzilla) linked in the Common Issue, because that’s the place that developers watch, not here.
If there are any updates/changes/amendments for the Common Issue description, which you believe should be performed, please post it here.
I’d say the best solution for upgraders who want to keep their partitions as they are is dnf system-upgrade`.
I know you’re adressing the case “fresh /usr, keep /home”, but I’d guess “upgrade in place” is the more common case and does not need a workaround. Maybe worth mentioning.
I didn’t realize someone might want to reinstall when they can upgrade, but yeah, it’s possible, good idea. I added a note to the issue description, thanks.