This has not been addressed, and many people need this update:
Treat graded discussion postings like assignment submissions. When a student makes a posting to a discussion, it shows up on the to-do list regardless of whether they've already been marked or not. Discussions marked "incomplete" or not graded should be given priority, so they show up at the top of the SpeedGrader list.
This has been a known issue for years, but we seem to be ignored or dismissed.
Please fix this.