The injunction to not add peer assessments to courses that are already running comes up a couple of times in this document, neither time with an explanation of why.  Is there a reason for this restriction?  If so, let's say what it is.  And if not, then maybe drop that injunction in favor of saying more about how to test a peer assessment before it goes live by setting it up in a test course and having a group of beta users submit responses and grade each other, reporting back to the instructor on whether they found the question and the rubric easy to understand.