I am looking to submit a feature request for the following use cases.
Global filter for an active list.
For example, on a specific list, I do not want any of our team members showing so I would add a global filter saying "Email does not contain /at/emaildomain.com or is empty". This would have it apply to all groups rather than me adding it to every group.
This is a quality-of-life fix and does not inhibit activities as of right now but would cut down on admin time considerably.