Subtask below each task
I think it would be a good idea to have a option to display in the main task view the subtasks of each task just below each one, indented end with a smaller font and checkbox. This could be even an expandable list when clicked or hovered the task. For me this improvement would provide a better view of how complicated the task are and how much work remains to be done.
To visualize what I have in mind I attach a file with a simple and fast draw. I believe you will do it in a more elegant way.
We don’t have any plans to enhance subtasks in such a way at this point in time.
Joel Anderson commented
I agree — subtasks that are hidden until you click on the parent task are not effective.
It is very difficult to get the "big picture" of a project if you can't see subtasks for multiple tasks at once!
A collapsable outline view is ideal for expanding all tasks and subs tasks when an overview is needed, and collapsing when you want to focus on just a few things at once.
Also, the "detail view" has tons of information squished into a small little box., while the majority of my screen shows a single line of text (the task).
Moving sub tasks into the main task list view pane will help declutter the detail view.