I don’t find much to disagree with among those points.
And on further independent research, I would like to retract my own point 4: What had been presented to me as “fact” is apparently mere speculation. There is no DSS passage identical to any verses from John 1; Rather verses 1-4 and 9-13 simply appear to be citations to an older source, and similar in many ways to prophecies found in the DSS. While the speculation may be warranted, I had understood it to be, and presented it as, documentary fact.
Even if it is just speculation, I’m still interested in what document and which secondary source. I have a course on John that had been an occasional course but is probably moving into a two-year cycle and this looks useful.
I was looking at your articles posted in an attempt to figure out where you were from and saw that you were the one who was part of a group thinking of starting a college a few years ago. How did that turn out?