Let's say I have a room with 20 air terminals. I want to change the flow of each of them to a given value. Right now the fastest way to do this is to select them in a view and change the value for all of them in the options bar.
If one tries to do this from the schedule, it is way too slow.
If the spreadsheet nature of the schedule would support a number of excel features, this would be an alternative and possibly a better way. If I wanted to change 15 to a given flow and 5 to another, selecting in the model starts to become painful. If the schedule supported more editing features ala excel, this would be faster and more conveniently done in there.