Teachers would be much less likely to miss marks for learners, especially subjects with composite tasks, if they could see all of the marks for each subject as they fill it in.

For instance, English HL in Grade 9 in term 4 has marks for an Oral, writing and examination. If all three were visible at once in a spreadsheet type view, it would be a great deal easier for teachers to fill in all of the marks at once, to ensure that they have entered each task's marks and to assess the overall performance of the students and their relevant weak areas. 

I think this feature would be supported by many teachers, especially since I have overheard my colleagues discussing as much.