Interesting. dnf upgrade/installed Fedora 34 over 33 with only minor issues. During the process, tools rebuilt as normal during the new kernel's runscript, and everything seems to have applied nicely. Only minor issue was all the gnome extensions blew up, and the new(er) extensions app doesn't work, but that was quickly fixed by using the gnome website to update all the broken extensions.
So, if people had to uninstall Tools, then re-install them to get Tools to work properly, I'm just wondering if there was something odd about the installation or dkms setup that caused the problem to begin with. Certainly by re-installing it fixed those problems and it shouldn't recur - that is - until any kernel updates break it.