In table view, we often look at time allotted vs. actual time worked. This works great if tasks close our every month, but it fails when tasks span a longer timeframe. If we could show total allotted time for a task and then the time worked for that task for the filtered time period that would be amazing. The total time is already there. Then we'd be able to quickly see how much time we estimated, how much total time we've worked, and how much time we worked for a specific time period so we could bill every month for time worked.
Same goes the reports. We need to see total time allotted for a task, the actual total time spent on that task, and then how much time we worked on it for the previous month so we can bill for it.