Just a couple of places where the text could be made clearer:
In the Abstract is this text:
This document changes the recommended default IID generation scheme
for cases where SLAAC is used to generate a stable IPv6 address. It
recommends using the mechanism specified in RFC7217 in such cases,
and recommends against embedding stable link-layer addresses in IPv6
Interface Identifiers.
However, it would be useful for readers who aren't deeply familiar with
the subject to provide a brief description of "the mechanism specified
in RFC7217". I suggest
It recommends using semantically opaque IIDs generated by the
mechanism specified in RFC7217 in such cases, and recommends against
embedding stable link-layer addresses in IPv6 Interface Identifiers.
Similarly, the introduction contains
As a result of the aforementioned issues, this document changes the
recommended default IID generation scheme for generating stable IPv6
addresses with SLAAC to that specified in [RFC7217], and recommends
against embedding stable link-layer addresses in IPv6 Interface
Identifiers, such that the aforementioned issues are mitigated.
which would be more informative as
As a result of the aforementioned issues, in order to use
semantically opaque IIDs, this document changes the
recommended default IID generation scheme for generating stable IPv6
addresses with SLAAC to that specified in [RFC7217], and recommends
against embedding stable link-layer addresses in IPv6 Interface
Identifiers, such that the aforementioned issues are mitigated.
Dale