This problem could be solved if Github simply sorted the list of forks by stars instead of alphabetically.
btw, iirc GitLab does give you the option of sorting by most recent commit.
- hide any repo that hasn't seen any commits
- show commits ahead and behind as well as number of tags
- include issue tracker activity
- highlight those forks that were renamed which is often an indicator of a new package/gem being released from this fork
- Show a link from the main page of a repository to the most active fork to make it clear that there is an active fork at all.