The document generally looks straight-forward. However, it's surprising to me that the Security Considerations section completely defers to RFC 4861. For example, surely a device lying about being a SNAC router would have some added implications for DoS capabilities like mentioned in Security Considerations section of RFC 4861 and RFC 3756? I think it would be worth spelling out what happens in that scenario.

Nit: In the introduction, "Stub Network Auto-Configuring Router (SNAC) router" says router twice, can just remove the first "Router".