As such, Mr. Foster clearly fails to understand the import of the meeting.
1. The fact that the ABC is represented at all in this meeting is huge. It's quite obviously not "exclusively internal," else the fellow wouldn't be there.
2. There's nothing wrong with the ABC trying to get these folks to talk. It's pretty certain that Iker won't get rolled by the once and future PBs and they, in turn, won't change their minds. But the effort must be made. If it fails to make headway, that's a huge result.
3. Being intended for "the Episcopal Church to make its own conclusions" is, first, what the ABC is supposed to do with intra-provincial matters. At the same time, however, he's definitely got a dog in this fight, and his stated position is that the present leadership of the ECUSA has not acted in a manner consistent with membership in the Communion. A good result, from Canterbury's perspective, would be one where Griswold and Schori give in. They probably won't.
4. The presence of the ABC's representative at this meeting allows only one interpretation: he's there to see whether (in the words of the Windsor report), the ECUSA has chosen to "walk apart."