As I was saying, the arrival on Hoth demonstrates the idea of a Jack of hyperspace sensors perfectly with Vader, Ozzle and Piett. Ozzle came out of Hyperspace too early, putting them across the solar system. Vader had assumed Ozzle would have emerged in high orbit to take the rebels by surprise. In response Vader executed Ozzle and promotes Piett. As for the Last Jedi. The hyperspace tracker was a horrible idea! Any decent writer could have told Rian Johnson that. What he should have done was have a spy on the rebel ship with a hyperspace beacon. Leia, Poe and Holdo could have arguments about how to find the spy while Rose and Finn yelled to board the Imperial Dreadnaught to take down their transmitter array... Or heck, maybe they had a contact somewhere that could identify the traitor. So many options but instead he bent the universe to fit his story