Slim,
Best evidence is that emphasis on Jehovah's name came from Rutherford. And yes, Franz was responsible for the New World Translation in its initial form. Mom, not a Witness as you know, was impressed with it, even while hating the abuse of English grammar. But, these things came BEFORE the emphasis on 1975. He probably was not solely responsible for the writing department's idiocy that followed. But whoever else contributed to the false hopes he was the prime mover.
Even in the 1970s, if a private individual promoted something like the 1975 fiasco, they'd have been hauled before a committee. That Franz was allowed to maintain his position and was still held in awe was hypocritical.
The newly deceased Pope is said by those who should know to have held heretical views of death and the afterlife. Some of the higher level Catholic clergy considered him a "false pope." How was he different from Franz? There is always a large measure of hypocrisy in religion organizations. Even in those who take the Bible seriously, which the Catholic sect does not, replacing it with "the fathers." Even then, the Catholic sect is not consistent, choosing quotations selectively.