Since all the members of the NWT translating committee are dead, getting a revision will be difficult. But then again the GB could hire a medium to channel Fred Franz to guide the task.
Unlike the Revised Standard Version Bible which was first published in 1946 and totally revised 50 years later as the New Revised Standard Version, the NWT has seen little updating. The NWT still uses vocabulary of the late 19th and early 20th Centuries rather than 21st Century English, no doubt courtesy of Fred Franz who completed his education in 1913 and then spent the rest of his life at the Watchtower monastery in Brooklyn, isolated from the real world.