Hi, refiners fire,
You said, "Mormons used to believe that God inhabited a physical body. Whether they still believe that is a slippery issue."
Nah, nothing slippery about it. It's still doctrine.
You said, "(Eternal Progression) is hidden from public view. Anyone going to a Mormon meeting for the first time will hear nothing of such beliefs. He will only hear about Jesus, Jesus, Jesus."
Funny, must anti-Mormons claim they never hear ANYTHING about Jesus at our meetings, which is of course pure trash since everything about us centers on Him. But Eternal Progression is a key doctrine and never hidden from anyone. It is thoroughly covered in the missionary discussions, and is often covered in lessons and talks given on Sunday.
You said, "The second added "revelation" in D/C ... says Black people can now be members of the Priesthood...One wonders that the Civil Rights Movement might have prompted this change in Doctrine."
No. Actually, several Presidents of the Church sought permission to make that change, but were refused until the Lord himself said the time had come. The reason why the wait was necessary is known to anyone who cares to investigate it, but it had absolutely zilch to do with anything happening here on earth at the time.
You said, "Preexistant beings coming, by agreement, into this physicality for the purpose of experiencing "Fallenness" (as our doctrine, in your understanding of it).
No, not fallenness, but mortality, which to us is not fallenness, but is an essential part of the Eternal Progression you mentioned previously, which required each of us to come here, experience mortality in a physical form, and learn to walk by faith.
Thanks. Hope this helps.
Susan