As an instructor, when I make some major adjustments to my grade book, every little thing that happens to the grade book "dings" the student's notifications.
There should be a feature to allow some changes in grading and the grade book without completely freaking my students out. I don't want to start moving assignments and adjusting categories and kids getting notified about every little change. There should be a way to FREEZE my grade book and then UNFREEZE it after I've made the changes. Perhaps this could be like one big button or drop-down option to "Hide/Unhide Entire Gradebook".