Hi Doug,
There is a work around, but it takes ongoing extra work from the teacher.
Make some grade categories, such as Unused, Current and Completed. Place future assignments in unused. Place current assignments in current. Place assignments that have been completed in completed. In Grade Administration Setup, order the categores as current, completed and unused.
Now when in Grade View, all your current assignments are closest to the student names. Beside each category name there will be a button that lets you cycle through various views where the column just shows Aggregate only, Full View, or Grades only. Keep current set to Full View, and the others to Aggregates only.
The down side to this is the teacher has to go into setup on a regular basis and move assignments to the category they need to currently be in. This used to be much easier because you could drag and drop assignments on the grade setup page but now it is click to select, scroll to new location, and click to place.