For me the interesting thing is what the early Christians thought about the Son of Man. From what I can tell they identified Jesus as the Son of Man of Daniel 7 and they perceived him to be a supreme angelic being distinct from and subordinate to God. This might be different (probably is) from what the original author had in mind, and what later Jews thought, as well as later Christians.
To me the distinction between Jesus and God is maintained in Rev 1 and throughout Revelation. It may be that Jews came to identify the Son of Man and the Ancient of Days as one and the same person in response to the so-called two powers heresy, just as later trinitarians in their own way conflated the two to suit their own dogma.
But as far as the original author was concerned, they seem to be separate beings, and the Son of Man is naturally subordinate to the Ancient of Days, and the same probably goes for how the early Christians identified the Son of Man.