There are two sort of items, that needs grading in assignment:
- files, that uploaded first time;
- corrected answers, uploaded after teachers grading and comments ( date of the student answer later that date of teacher's grading).
While first are very easy to find in large table, second requires full attention to every row. It would be much better for teacher, if such rows would be highlighted in some way. It's easy to implement, but saves many trouble for users.
Also, it will be useful to have check box 'show only answered students' in quick grade mode, because empty strings simply clatter the output (execpt off-site answer assignments, of course).