Description of problem: early r600 DRI available: install the mesa-dri-drivers-experimental package.
The Fedora Release Notes highlight significant changes to Fedora. Of the thousands of changes, this one applies to quite a tiny community. Indeed, the upstream seems to recommend against installing it. However, the change is noted in 8.9.3, tho not explained.
I think you are grossly underestimating the impact of this change.