Do you think that John had any input into Revelation?
Speaking for myself, I tend to think he did to some degree. One reason why, first he sees the visions in question while writing down what he is seeing. Then at a later point in time, apparently meaning after seeing all these visions, he then makes a finished book containing what all he wrote down earlier.
Take, for example, the following.
Revelation 13:8 And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world.
Is not John the speaker in this verse? How then would he know one way or the other, that all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world?
He knows that based on all the visions he has seen throughout. Keeping in mind, he is not saying some of these things while he is initially seeing the visions. He is saying these things after he has reviewed all the the notes he had taken by writing what he saw at the time, IOW, once he formulates this finished book, the book of Revelation.
The first cpl of verses alone in ch 1 proves that he is not formulating a finished book in real-time, so to speak, involving these visions. But that he sees the visions first, takes notes concerning the visions, then later makes a finished book out of what he saw earlier.
Revelation 1:3 Blessed is he that readeth, and they that hear the words of this prophecy, and keep those things which are written therein: for the time is at hand.
How would he already know this before what is recorded in Revelation 1:10 and the verses that follow occur first? Already, this alone proves that the book of Revelation is not in chronological order throughout, since it is not reasonable that John could already know about what verse 3 is involving before what verse 10 is involving even occurs.
You keep bringing up that verse 3 proves that the book of Revelation requires no interpreting of anything. What I submitted above, aside for now, is that a reasonable conclusion to come to pertaining to verse 3, in light of the following, for example?
Revelation 13:18 Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.
How does one do what is recorded in verse 18 without it involving interpreting anything?
Since this post ended up being lengthier than I initially anticipated, I guess I better stop here then.