Thank you Half banana for your Post, most informative ! I have "The Shepherd of Hermas " in my Library, and read it many years ago, but never noticed the absence of Jesus and Christ in the Text ! of course, back in those days I was an active J.W, and we were mind controlled to "read things in to" whatever texts we were reading.
I fully endorse your comment on the very early period of Christianity : "There never was a moment when it arrived fully formed in the middle of the first century". And I would add , it was far from "fully formed" at the end of that Century, when the Apostles and nearly all eye-witnesses of Jesus were surely dead ! And as you say, controversy raged on, and continues ! Of course we see various theological ideas emerging in the New Testament Books, these being written against a background of the existence of a number of groups claiming to be followers of Jesus, all with varying theologies.
Our very own Poster, Doug Mason touches on this in a number of his Papers, and maybe more so in his latest Paper, still a work in progress.
Gnosticism of course is fairly well known, and probably affected the writer of the Gospel of John. The Nestorians I think were very early, and other nebulous groups who fizzled out, and we have scant knowledge of, unless they were condemned as Heretics by the Church that came to call itself Orthodox, itself several removes from proto Christian Theology.
All of this is a very different picture from the one drawn by the J.W Org ! The evolution of Christianity is quite as messy as the Evolution of Life on earth !