Its purpose can scarcely be to tell members of TEC to remain steady on the tack they are sailing. Nor is it a private letter remonstrating directly to the ABC, or even the other primates. My sense is that it is a letter intended to tell the wider Anglican world that there is good reason for TEC being where it is at, and thus unfairness and misrepresentation in the Pentecost letter. A letter, then, from the PB intended to persuade fair-minded observers that TEC is worthy of full involvement in every part of the Communion's life.
If this is its purpose, does it achieve it? Does it provide a strong case for denying the validity of the ABC's conclusion to his Pentecost letter?
What do you think?
In another post I shall offer answers to these questions.