Also in line with the other comments made here is a thought that occured to me. By highlighting the name Jehovah, the Watchtower has de-emphasized the name of Jesus. All attention is focused on Jehovah as we can see from the many recent Watchtower study articles. As Blondie has asked many times in her "Comments" series, "Where is Jesus"?
Even the Kingdom Melodies has reduced the number of songs that had praisees to Jesus in them to fewer and fewer songs and more and more praises to Jehovah songs.
Blueblades