Yeah I like it a lot. It’s worth noting that is actually canon (as much as I hate to admit it). I hate the idea that nobody showed up to Crait because all the communication lines were jammed by the FO, but that’s the official answer. Might as well have it referenced in the crawl to a lesser extent.
Yes, the point of that in the movie was to reinforce that everything was hopeless with the FO in charge until Luke showed up.