Many SCRUM teams do not work with parent stories and subtask. SCRUM teams should be able to choose whether the storyboard shows horizontal swimlanes that are organized by story or if the board shows more like the KanBan view where there are only vertical swimlanes organized by task status. Our teams are losing too much screen real estate when grouping in horizontal, per story, swim lanes. It is common for an iteration to have hundreds of tasks for a team that spread across 30 different projects that each have multiple parent/subtask structures. It is impossible for users to quickly find their task within the story board due to the lack of search functionality in the board and the breaking down into horizontal swimlanes.
