The command line currently created by Brim when launching zqd (such as in GA Brim tagged v0.18.0) prevents remote access because the option -l localhost:9867 specifies localhost. This makes sense as a default. However, if is this were shortened to merely -l :9867, the zqd would be prepared to accept remote connections. Therefore we could make this an option that could be enabled in the Preferences menu.
A possible use case might be for a user that's running a Capture The Flag event and has imported some pcaps and logs via Brim and wants to quickly make them accessible to participants.