Enhanced task management
It would be wonderful if there was a way to manipulate the task view to organize tasks by multiple levels. Right now, it's only possible to sort by one level. I recall being able to do this years ago in Outlook.
Alternatively, there seems to be a huge gap between the project management capabilities of Microsoft Project and task management in Outlook. I have multiple projects to manage, although can't get the functionality I need in Outlook, while Project is for much larger scale project management. Is there something in between?