It would be great to be able to see which assignments rubrics have been attached to. As an instructional designer, I work on a hundred courses, not all of which were built by me, and it would help greatly to know which assignments to edit when the SME sends in an updated rubric.
Imagine you need to update a rubric in a course that you didn't develop or build. You find the rubric in Outcomes but it isn't clear which assignments it was applied to. So you click open all the assignments and discussions to see if that rubric was applied. Once you find the one or x number of assignments, you delete all but one rubric (so that the name of the rubric doesn't become "name of rubric (1)"), make edits to the last remaining rubric, and then attach the updated rubric to all the assignments.
If there was a way to see the alignment of assignments and rubrics, it would free up time for making the edit earlier.