Easily create subtasks
Creating a subtask used to be a top-level action while adding a task but it was recently buried under a 'More options' menu. I would like to see it promoted back to the top-level. More importantly, it should be implemented as 5 buttons, one for each possible indentation level. The current pick-list behavior is not preferred.
Why not add some shortcut keys to add subtask, that's very common if you note down something first, then define the actions next.