The Revised NWT has a footnote on John 1:1 showing that "a god" means "divine."
Also, their other publications are now much more boldly referring to Jesus as divine:
Jesus--The Way, The Life, The Truth (2015), Page 306-307:
"Thomas exclaims:'My Lord and my God!' (John 20:26-28) Yes, he now has no doubts that Jesus is alive as a divine being who is Jehovah God’s representative."
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Awake, April 22, 2005, Page 9:
Jesus is a god in the sense of being divine