Give substasks same options as task; and ability to see progress of task based on status of subtasks.
Allow sub-tasks to be managed in the same way as task. I've created a Kanban board using Planner. However, 1 task can have many sub-tasks that needs to be done by different people each with its own due dates. It would be so helpful to be able to see what subtasks are completed and the overall progress of the task. E.G. TASK A due in Dec can have 15 subtasks due at various times in the year. I'd like to assign each subtask to different persons, and see the s% completion of TASK A