It would be helpful to be able to split out the Time Estimate field in list/table views into the "rolled up" time for parent tasks as well as the Time Estimated for that parent task itself. You store the data because when you click on the field, it shows you the amount estimated for that task only, but the displayed time is the rolled up time for that task plus all of it's children.
Both values are useful, and sometimes it is useful to see the separate values in views.