Hallway scene is only ‘cool’ because we care about Vader. Otherwise he’s a monster committing atrocities. It’s a terrifying scene, if you shut your eyes it’s like you’re listening to a psychopath in a horror movie killing desperate people. For someone that doesn’t know Vader, that’s just scary and evil incarnate.

For me, it was the first time I saw him as purely a monster too, no personal motivation, just a hateful killing machine slaughtering people fighting against tyranny. His ‘evilness’ in the original Star Wars is shadowed by Tarkin’s for the most part, and in Empire and Jedi it becomes personal so it’s less cold. In Rogue One it’s just pure, free and needles hate. And on top of that, for us fans, it does look cool as well. I don’t see a problem with it.