Frye is quite clear on that. Frye is trying to help us recapture the power of metaphor and symbolism, but that doesn't mean we have to abandon the power of analytic exegesis.
Good commentaries are helpful here.
The Laymen's Commentary on the Bible, published by Knox Press in 1961, has been helpful to me in terms of understanding the meaning of a lot of the symbolism in Revelation and in understanding John as a sane man attempting to communicate a message of hope that, if it fell into the wrong hands, would result in the torture and death of anyone associated with the message. He veils his message of hope in apocalyptic language to confuse and mislead enemies.