Currently we use swimlanes based on user stories. Having a lot of stories with subtasks makes the board quite unclear.
Is there a way to remove the swimlane for a story where all subtasks have been closed? That way they would return to the "Closed column" and make the board more overseeable. (We close the user story based on the transtion of the subtask, that is not my question.)
If your Stories are closed, you could just add "AND Status NOT IN ('Closed')" to your swimlane queries. As it is, I think you'll need an addon; this is a lot like other questions about searches based on linked issues. See JQL to get blocked Issues and How can I find a list of all tickets that are linked to issues that have been resolved?