Am still thinking about this movie. On fiuther reflection, I think Damien Chazelle's #Babylon would have been brilliant as a limited TV series.
Each of those characters had an interesting journey that could have been explored in more detail. E.g. Jean Smart, who I had only previously seen in FX's Legion, was amazing as the gossip columnist. She gets much more credit here from her fellow actors than in the movie itself. https://youtu.be/Pm2fEoeXkV8
The manic segments, including the big party scene and other similar ones, could have been retained, and would have been balanced against more introspective, exposition pieces.