Here is another F11 feature that will become complete enough to warrant
testing in the next few days:
https://fedoraproject.org/wiki/Features/AutoFontsAndMimeInstaller
The mass rebuild that is currently underway will make sure that the
font- and mimehandler-installing packages gain the Provides that are
necessary to make this work.
Please give it a try once the mass rebuild lands in rawhide.
Matthias