I think the new method will be far preferable for instances where individual student data needs to change. I did include a note (line 301 below, for ex) that the instructor dashboard could also still be used to make changes for  individual students. 
(Bkgrd: For me it came down to, document the UI (where you can make changes: Staff Debug vs. Instructor Dashboard) or document the task (change one student vs. change all students). I'm always striving to document the task. That's the rationale behind the new subheadings and division of info. Rather than provide two full sets of instructions for changing one student's data, one of which would be mostly redundant with how you change data for all students on the Instructor Dashboard, I pared the old set of instructions down so that they describe only how to make the change for all students, but added the new note as reassurance that the old workflow for one student still works. In case you're interested...!)