"5000 manuscripts," Is bandied about, and means to mislead, NONE of those are early ! so prove nothing.
I really don't think it matters much the question "was the Name in or not", but there is a real slippery slope when people like J.W org change what the best MSS say, once you start doing that, where do you stop ? Why not write whole new N.T ? (They are some way down the road to doing that).
I think Slimboy made a good point, the Name may have been removed for devious reasons, as the Trinity Doctrine developed. But that is no justification for what J.W Org has done.