A way to track your progress with meeting deadlines and how many times they are moved. This could be integrated with capacity planning, but per user. I would like to see my personal capacity across all features and To Dos and keep track of it. This way we could better plan projects without overloading capacity per person.
This would be a great way for each user to categorize and prioritize work. Additionally, a calendar view and a campaign view would be great ways to segment the approach.