It would be nice to have an option to fill a subtasks properties from the parents. Rather than a default setting, I'd prefer a check-box. Often, I will create a shopping task for a specific store with the items I need to get there entered as subtasks. It would be helpful if I could have them all assigned to the same context and dates as the parent.
Subtask inheritance of parent fields has been a fairly popular request. Currently only Folder is inherited, but Toodledo has said they plan to allow for more extensive inheritance of parent task attributes.