Yeah, the list on Device Setup -> Communications is currently not editable, though after initial configuration - most users don't revisit that page. The page you'll most likely be on more frequently would be the Group -> select group -> Basic page, and that one can be narrowed down to just 'devices on the AMP' or 'devices in the group'. It's going to be a feature request to change the Communications page which will depend on Product Management decision based on the feature request and upvotes on that request.