A rewrite that could have made the film a lot more interesting would be if, instead of the hyperspace tracker being the result of some new technology, it was instead the work of a spy. So Holdo can't tell anyone what's going on, and Poe takes it upon himself to go on a mole hunt (possibly because his friend Finn has been implicated and he wants to clear his name). None of the Star Wars films have ever really dealt with spies, so it would have been a new scenario for the franchise which would also have been nice.