Part of participating in online coursework involves working with other students to improve drafts and engage in the learning community. When students are assigned peer reviews, let's be honest, they aren't motivated to complete it unless there is a grade attached. I would love the ability to grade peer reviews.
This could be as simple as complete/incomplete, or more complex where the completion of peer reviews was part of a grading rubric for the assignment. But it would be nice if there was something in the grade book, some academic weight given to participating in these reviews, that doesn't involve manually looking up peer reviews outside of the grade book.