I was thinking more on the showdown scene, and how it could have been better. One of my slights against the show is they don't give a scene room to breathe, they don't let a character have a chance to be who they are in a space or time, so you get really awful shouty lines from someone like Reva that come across as unbelievable and hilariously bad.
As the robot takes Obi-Wan away it should have played out almost like when Jon Snow sees the Night King. Vader should have just walked through the flames and stood at the edge on Obi-Wans side, with a slight force shield around him protecting but also being engulfed by the flames, and a reaction from Obi-Wans POV from being taken away.
It would have made the scene even more obvious of the cat-and-mouse nature of Vader letting him go, instead of abruptly seeming less powerful in that instance. And also just as a call back to being engulfed in the lava and flames in RotS he is now someone who willingly stands amidst it and in control of it, Obi-Wan has forged him in the fire and it's part of him now. In a little bit of staging so much would have been said.
I think for me this show just lacks extreme finesse, it doesn't have to be more adult. RotS was quite bold and adult in nature for kids. It just needs people who know how to better the show with actual good ideas. And yes I think my idea is good
Primarily because it slows things down, let's a scene breathe and lets more be said by showing than being explained.
Anyway... Rogue One still has THE best Vader scene of all time. This tried to top it and failed.