In card view, Column headers are currently static and represent what has been added in a dropdown list in a Grid view column. In practice, Column Headers for swimlanes would be more beneficial if they included similar functionality to a standard cell. For instance, if I have 652 cards, it would be helpful if a swimlane could automatically represent the % of Cards in a given swimlane. Or, some sort of field for a sub-header would be useful. For instance, attaching a due date to each column that would cascade down to all cards in the swimlane.
