The Velocity report is an awesome way of looking back at past sprint performance to help determine the velocity of the team. It's also really insightful seeing the load per sprint and when there is an anomoly, I'd like to be able to click on the sprint and see the details drawer for that sprint (to review the retro notes, for example, in the sprint description for any detail). I'd also like to click the bar on the sprint and drill down into a list report containing the records.