Great thoughts. Yes, I think the diversity of the early church is pretty apparent. But I think the fronline article makes a good point at the early christians trying to make sense of their experience and express it in their teachings. If you believe in fact that the basis of their experience had anything to do with God's supernatural intervention through his son, then you would naturally suspect he'd assure that the purpose of his intervention would not get lost in the shuffle.
Another interesting part of the frontline article is its description of gnostic christianity and its total emphasis on knowledge as the basis of Godliness and salvation. Now there's a similarity to early Christianity that the JWs have accomplished. Probably not the association they were shooting for though.