It can be very helpful and time saving for teachers to have a direct link between the activity's setting page and the activity's GradeBook grade item setting page. (maybe just after the "cmidnumber" field inside the "common module setting" section)
Currently, they have to navigate to the GradeBook page. Turn "Editing" on. Click the specific activity's "setting" icon.
(actually, it could be even better if we had a cross link back to the activity's setting page, too)