Are below assumptions regarding the visions of Revelation correct or at least reasonable, or if not what would be the argument against?
1. The visions were revealed to John in the order of the chapters. So this is not about if the order of the visions in Revelations is the chronological sequence of the events, but only the sequence in which the visions were revealed to John.
2. The visions were not revealed all at once. Which portions may have been revealed together and why these?
3. John would have interpreted what was shown to him in the context of his personal knowledge and the culture of his day.
The 3rd yes, John was just writing either what he was told to write, or what he saw and he just described it as best he could.
The first and second I don't know if he was shown in order but there are certain connecting phrases like "and after these things" which to me indicate Chronology, but sometimes he just says "and I saw" which doesn't necessarily mean Chronology. The breaks in Chronology seem to be Chapter 10, Chapter 12, and Chapter 17. Chapter 10 (and the first half of 11) and 17 don't give timing markers they seem to be things that take place throughout this time period discussed but are not given in Chronological order. Mystery Babylon was around before Revelation 13 is what seems to be the case, the harlot rides the beast, then the beast is elevated by the 10 kings and then the 10 kings strip the harlot of her power, and give it to the beast, and ultimately at the end when Babylon comes into remembrance to God after the 7th vial, the 10 Kings destroy the city.
There seems to be sequential order within the seals, and sequential order within the trumpets, and the trumpets seem to be sequential after the seals, but chapter 12 seems to reset Chronology, details start being duplicated in chapter 14, and the vials almost seem parallel to the trumpets.. the vials are sequential within themselves, but don't seem to be sequential with the trumpets. 7th trumpet the kingdom is taken away and becomes the Kingdom of God and His Christ... 5th vial is on the kingdom of the beast, and I don't think Jesus' first act as King of the Earth is to give authority back to Satan.
So I largely see Revelation as the letters, and then heavenly visions given in 2 parallel narratives focusing on different details but referring to the same time period, with 2 parenthetical explanatory sections: Revelation 10 and the first part of 11 (I don't believe there's 3.5 years between the 6th and 7th trumpet and the 2 witnesses only show up after half of the earth's population is dead, "repent the end is nigh" kind of seems a bit of a "duh" when after the 6th seal people already know it's the day of the Lord's wrath)), and Revelation 17
Most the rest there's either a sequential order like the 3rd seal would have to follow the first two, the 7th trumpet would have to follow the first 6, the 7th vial would have to follow the first 6, or there is connecting clauses like "and after these things" that indicate Chronology, or the passage refers back to details in previous chapters, such as chapter 16 17, 18, 19 and 20 referring to the beast introduced in Revelation 13, especially 20 refers directly back to Revelation 19 and the Beast and False Prophet thrown into the lake of fire, which I think is a problem for people who want to see Revelation 20 in the ammillennialist way, where Revelation 20 is just talking about the "intra advent period", it would require a preterist view of the beast and false prophet, but not all Ammillennialists are preterists so they have the problem of believing Revelation 19 is a future coming of Jesus, and He throws the beast and false prophet into the lake of fire.. but then they have to try and reconcile Revelation 20 showing the beast and false prophet are already in the lake of fire when Satan is cast into it.
No one can answer 1 & 2
#3 John would have written what what he was told to write by revelation from Jesus Christ regardless of personal knowledge or cultural insight.
Sometimes Jesus dictated what to write. Sometimes John was shown something and then explained what it meant by an angel.
Other times.. John was just shown a vision and he wrote down what he saw, and that could be influenced by John's own ability to grasp what he saw and have words to describe it.
