I know that there are at least two other mentions of this feature request, but they are back from '14 and '15, and still, here we are.
I believe that a great feature would be to add a keyword, or a blacklist keyword per show.
This would be very handy in allowing you a preference for release groups.
Say, for instance, I want the releases that Gemini put out there.
Or I want any release except the TBS release.