One minor point as I rewatch the movie - Finn and Rose are able to escape the Raddus undetected by either party and go to another planet. Since Holdo’s plan is to rely on reinforcements from the Outer Rim after boosting the signal from Crait, why couldn’t a few Resistance soldiers have taken that cloaked hyperspace ship and gone to Crait ahead of the Raddus? Or have been ferrying people off the Raddus onto Crait for hours, preventing a situation where all of the Resistance’s eggs are in one basket?

Frink would say I’m trying to dislike this movie.
But I like nitpicking the plot.