How about cutting Finn and Rose (almost) entirely from the movie? Move Finn waking up shortly after Holdo assumes command. Finn’s “where’s Rey?” cuts to Rey arriving on the Supremacy. Canto Bight and the Hyperspace tracker, all gone. Besides just cutting a poor subplot, it also simplifies the story considerably by letting us focus in on the arcs of Rey, Kylo, and Poe. Finn could try to escape right before the mutiny, providing us a small intro to Rose. Then they aren’t seen until Crait, with Rose’s “arc” implied as her forgiving him. Poe can still have his mutiny, but he doesn’t mention Finn’s mission (Finn would be in the ship prison).