Fisherman:
1. The author of Revelation is God
Do Jehovah's Witnesses acknowledge the peculiarities of Revelation? Eusebius (quoting Dionysius) said in his church history:
Moreover, it can also be shown that the diction of the Gospel and Epistle differs from that of the Apocalypse. For they were written not only without error as regards the Greek language, but also with elegance in their expression, in their reasoning, and in their entire structure. They are far indeed from betraying any barbarism or solecism, or any vulgarism whatever. For the writer had, as it seems, both the requisites of discourse—that is, the gift of knowledge and the gift of expression—as the Lord had bestowed them both upon him.
I do not deny that the other writer saw a revelation and received knowledge and prophecy. I perceive, however, that his dialect and language are not accurate Greek, but that he uses barbarous idioms, and, in some places, solecisms. It is unnecessary to point these out here, for I would not have anyone think that I have said these things in a spirit of ridicule, for I have said what I have only with the purpose of showing clearly the difference between the writings.
Without disputing the idea of inspiration, it does seem that the writer of Revelation was free to use his own words and expressions.
2. Babylon the Great has not been destroyed yet.
Isn't that a circular prior assumption of your own viewpoint?