I like what you have done, but I must admit that I was hoping to see more about the symbolism.
You say much of Revelation is influenced by the OT, and you say that many things in Revelation are symbolic. My personal study involves how this implies that some OT books we take literally may have had symbolic meaning to NT writers, and that we miss some spiritual insight because of this. Especially the books that are seen as less prophetic and more literal like Genesis. Early chapters of Genesis and Revelation 12 for example; where we see all the same actors: sun, moon stars, woman, snake/dragon etc.
Any plan on addressing the symbolism and its meaning and resulting impact on the rest of the bible? If that is not the scope of the project that's fine, its just of personal interest. Other than that I'm not a writer, so I could not offer much advice, sorry!