When students click on the assignment from grades/recent feedback to view their score, they can view their feedback by clicking "View Feedback." This font is extremely tiny. It would either be ideal to enlarge this font, or show a preview of the feedback on that screen.
Additionally, a link to the original assignment description would also be ideal. This would be especially ideal for Google Assignments LTI, so students don't have to navigate back to modules/assignments to find out what the feedback is on their assignment.