A person may be able to make a case for the NW rendering of the Old Testament and their insertion of the name Jehovah. But there is absolutely NO EVIDENCE to support their inserting the name of Jehovah 237 times in the New Testament. Their justification for replacing the name LORD with the Divine Name (Jehovah) is because they feel that it was removed from the New Testament. Yet there are over 5000 copies of ancient Greek manuscripts of the New Testament that do not use the Divine Name or Tetragrammaton. In a few cases these ancient manuscripts were written just a few hundred years after the book of Revelation was originally written.
For anyone that believes that the NW is an accurate translation of the Bible, I would suggest that they investigate the history of the Tetragrammaton. Here is an excellent site: