I've got a couple "nice to have" things for suggested enhancements:
- When in course "Grades", and you select "View" >> "Statuses...", it would be nice to have an option to revert back to the default colors.
- Once you have defined the colors you'd like for "Late", "Missing", "Resubmitted", etc., it would be nice to have a color key/legend displayed at the top or bottom of the gradebook. If you forget later on what a color means, you have to click "View" >> "Statuses...".
My two cents...