I think they only way it could work (for me at least) would be if it was more of a 3-in-2 edit a la edits of The Hobbit. I’ve accepted TROS for what it is and there’s too much in it at this point that I would miss if nearly all of it was cut.
The Hobbit 3 into 2 was exactly where I was at when I let my mind wander into the prospect of merging TLJ and TROS into one.
Of course ‘The Hobbit’ for all of it’s flaws (of which there were many!) at least benefitted from being shot back to back and having a singular vision and so at least ‘fan’ editors don’t have to contend with cutting around footage filmed and constructed potentially years apart by different directors, cinematographers, editors, costume designers etc etc etc
Hence the challenge now faced by editors who might be starting to think about the viability of this project (or similar projects of their own)
The lack of vision for this trilogy exhibited by Lucasfilm is now painfully apparent and I have no doubts some of the guys and girls here will work their magic and make some wonderful things out of it…but it’s definitely going to be a tough challenge to extract all the right pieces and reassemble them back cohesively