I’m over here per Alexis from this thread to add my request for a notification for a date change when I’m a Collaborator of an item.
As a project manager I add myself as a collaborator to all tasks so that I’m updated when changes are made. Yesterday there were several modifications to dates of some very key tasks and I was not notified by the person who made the changes, nor did Asana notify me as a collaborator that the changes were made. (Yes, I’m aware that’s a communication problem but I don’t have control over 3rd party project members, unfortunately.)
It would be nice to add this type of notification to the list of items which collaborators are notified of. Or, if you add the ability to customize what types of notifications you want, this would be a great option to include.