I would use this for many things. This keeps subtasks together without creating a section and allows you to have a assignee for the complete task but assign the subtasks to others. Upvote!

This would be a major WIN from our point of view due to the complexity of our engagements.

We have a number of tasks that require more than one person's participation to complete. There are specific subtasks assigned to each person. We'd need this incorporated for us to transition to Keeper.