lightman,
You are aware, I hope, that the Anglican Communion has NO formal structure? It began, almost literally, as a once-a-decade "tea party" between Mother Church (CofE) and her various offspring, including the eldest and unruly upstart PECUSA in the States, and was never more than that until recent times.
It had long been a convention that there would be no boundary crossings, that each church would be independent within its national borders.
This fell apart, of course, with the growing apostasy of some national churches: US and Canada foremost, but not all. It's growing worse with the decline of Mother Church herself -- the strength and growth now lies with the Global South, Asia and (to a smaller degree) the Continuing Churches within certain national regions.
The old Anglican model might or might not work for the Lutherans, depending upon your structure. Where world-wide Anglicanism is going these days, I have no idea because I have narrowed my focus to my own jurisdiction (for my own sanity).
That's the rub.
Far too many conservative ELCA leaders want nothing to do with Bishops, so those like yours truly who believe that the threefold Office of Ministry (Bishop, Prebyter, Deacon) is the Biblical, apostolic pattern are a minority within a minority.
While I can understand their blanching at the apostacy of most ELCA Bishops, I fail to understand how they cannot appreciate, much less be attacted to the good and godly witness of the Tanzanian Bishops.