David Trobisch argues that the New Testament shows signs of being editorialised in the second century because of the common features that early manuscripts share: use of codex; use of nomina sacra; order of the books; titles of the books; specific parts written by the editors (such as John 21); and even the name itself “New Testament”.
Interesting as that argument is, his related point about the original New Testament documents containing the divine name is established on independent grounds. As with George Howard, Lloyd Gaston, John McRay and Frank Shaw, Trobisch points out that the Jews used the divine name in their texts in the period when the New Testament was written and therefore the New Testament writers would have done the same. In particular he says that “it is not very likely that Paul would have avoided using the tetragram to please his Gentile audience”. He further argues that Paul and other New Testament writers made a careful distinction between YHWH and Jesus that was lost when scribes replaced the divine name with “Lord”. He cites the example of “Jehovah said to my lord, sit at my right hand”, which was clear in meaning for the original readers, to the somewhat confusing “the Lord says to my Lord, sit at my right hand”, once the divine name had been replaced with “Lord”.
This is only part of his argument. It’s worth reading his book if you can get a hold of it.