If the Bible indeed is from God, than I think the absence of his name in the NT (which is added into the NWT) is God trying to tell us that it is NOT important.
Think of it this way:
There is only ONE God Allmighty. Only ONE creator of ALL things. ONE First Cause. A name, by definition, is there to differentiate between like entities... God has no like entities, he is unique, therefore his name is not nearly as important as human names are.
-Sab