I would like to propose that your comments are addressed in the
related current SHIM6 document activity on the topic of an
applicability statement, and, given that situation, there is no
compelling case to revise the protocol document to include this (and
related) applicability considerations.
However, the applicability draft is not cited in the proto draft.
It's listed as a reference, but is not cited. That's going to
have to be fixed editorially anyway. I agree that the applicability
draft is the appropriate place to discuss this.