Subtasks often tend to be generic such as design, review, RFQ, purchase, etc. When in list view and subtasks are turned ON, you cannot identify the parent task of the subtask without clicking on it and seeing the parent at the top of the box.
I suggest you add the parent task in front of the subtask in these cases, ie task > subtask. Alternately add the parent task to the project > list above it, ie project > list > task.
This would be extremely helpful!
Thanks