I think it very much is a big deal! I was trained to go to people's door's and tell them that they couldn't have an acceptable relationship with god unless they used the name Jehovah. No wonder the Catholics and Protestants laughed at me when I said that. The majority of Christendom doesn't use the name because its a hybrid, man-made name. The real name is unknown. "Lord" or "father" is sufficient as Jesus set the example in calling him those titles.
It ticks me off that those little details were never taught to me in Pioneer School or the thousands of meetings that I have been to in my life time. Just because the society acknowledged it once in an obsolete publication in the early 70's doesn't make them transparent and up front about the problem of using Jehovah and calling it the only true name of god. The majority of witnesses today have no idea that the name is a mistransliteration and the product of a 13th century monk's imagination.
If people want to use the name Jehovah or Yahweh, that's fine. But they should know and teach the truth about the origin's of the name.