Excellent suggestion!
In fact, as part of the CI Objective we want to enable more such distribution-wide tests, such as rpminspect [0], installability and reverse dependency testing. The tests that have been run by Fedora QA are also being evaluated and those will be used directly or migrated.
At flock yesterday we had some good discussions on how to make opt-in more accessible, and I'm sure the Fedora CI SIG will take your suggestions into consideration. We all agree the current way of doing it isn't quite optimal. :)
Stay tuned in the coming weeks to hear more about how to opt into gating!
Thanks,
-Dominik