This issue is a large one focussed on improving usability and accessibility for teachers using Moodle gradebook (Grader report) on all browsers including touch screens and screen readers.
The Moodle Gradebook Working Group met in June 2014 and determined a number of key required features, which are detailed on the specification at http://docs.moodle.org/dev/Grader_report_2014 (still being finished).
In a nutshell expect:
- Full screen spreadsheet-like display that scrolls well but has static headers and footers.
- Filters to quickly reduce the information being dealt with.
- Links to row/column editors for speed and affordances.