Handman said:
I’m glad to find I’m not alone in thinking Darth was misused here.

I even think the Vader going wild is the worst scene including Vader in SW canon. In TMP/AOTC Anakin is not Vader, so no issue there. In ROTS, he becomes definitely Vader at the very end (after the “Noooo”), so there is only one true Vader scene: when he walks the Destroyer bridge to join the Emperor. I may add that when Vader/Anakin kills all the separatits it is close to the Vader Rogue One ending scene, but there is a huge difference: in ROTS, when he kills the separatists he has still good in him and knows there is something wrong (I particularly love the fact he doesn’t want R2 to witness his bloody actions), but he wipes out people we know (like Gunray and the other leaders we’ve seen in AOTC or sooner in the movie), which means we have an emotional connection to what’s going on here. In Rogue One, Vader comes when the story is finished (every single character of the story we’ve just seen in dead) and kills people we don’t know (random rebel soldiers). And this is so wrong at every level, because the scene is clearly made so the audience can cheer “oh damn Vader is so badass killing everyone”, which is sick, really sick. Rogue One is a drama movie and yet at the very end we are supposed to be entertained by a “fun” (?) slaughter, involving undevelopped and faceless characters ? This is the dumbest and sickest fan-service I have ever seen. It seems Gilroy shot the scene. This guy doesn’t get SW at all and the Vader character as well. A Jason Voorhees/Michael Myers scene to introduce Vader to the continuing plot is the summit of stupidity of this movie, which shows they don’t even know how to tell a story. When I give 0/10 to this movie it’s not to be provocative: I really mean it. I could give 1 or 2 for a few shots or a few ideas here and there but the overall movie is such an insult to Star Wars I can go higher than 0. Even AOTC is less insulting (which is amazing).