This would be beneficial for users, because they could clearly see if a calendar event is cancelled or rescheduled.
This is a vital feature especially to paralegals and other staff who need to be able to schedule events. In previous versions of Needles, we could tell from a glance exactly what was free/canceled/done just by color. Now, we have to open each calendar event for each day to see the status. It's far less efficient, and cases that are in litigation live and die by calendared deadlines and events.
We would also love this option - we never want to delete something from the calendar because we want to be able to report on past/rescheduled/cancelled events. But would be awesome to be able to look at the calendar and understand which things are still on at scheduled time and which ones are rescheduled or cancelled.