We’ve been emphasizing the affordances of focusing on syllabi, which are many, as you suggest, jasonrhody, but we should also continue to identify the limitations of this approach. You gesture to one limitation in talking about the possibility that people could game the system by flooding syllabi with references to texts.
Another issue to consider is that the focus of the syllabus is largely (but importantly not exclusively) undergraduate students. An undergraduate audience is importantly different from an audience of scholarly peers. We’ll need to keep this in mind as we think about what it means for something to be included on a syllabus, recognizing that syllabi differ considerably from one another depending on the levels of the students (intro., upper level undergraduates, graduate students, etc.) to whom they they are oriented.