I want to see what happens when the caretakers find out that their most sacred shrine has been looted and burned. They most likely assume it was Rey, if she ever goes back to Atch-To she'll be torn to pieces.

Re Finn, his knowledge seems to come from a mixture of strategic mopping and an encyclopaedic knowledge of FO protocols. Like, he's read all the giant handbooks and concludes that due to regulation 357B (C) (iii) if hyperspace tracking exists, FO protocols require a dedicated breaker room at a location G, because that's what the rules say must be done with any A Class process tracking systems. It actually works, although his tendency to mop so many plot relevant strategic locations is... well, a stretch.