I think the epilogue (as well done as it is on a technical level) feels off pacing wise. The montage idea would also just work for repeat viewings. A first time viewer would probably not quite get it, because they are not familiar with what the Inquisitors are.
Adding Padmes funeral is super nice, it is actually on my ToDo list to make a little edit that inserts that scene into the last episode of CW:Refocused. So all thumbs up for that. I think my biggest problem with Barriss is 3 things:

It suddenly brings a character front an center that had no real role in the movie before
It is different tonally from the rest of the rest of the material. We go from Ashoka burying the clones to Padmes funeral to Vader visiting was is supposedly Ahsokas grave. That kinda makes sense. Having footage in there of a new Inquisitor fortress being built clashes a bit, at least for me.
Both Padmes funeral and Ahsoka burying the clones are relatively close to the end of the rest of the story. Then comes a big time jump to Vader finding the wreckage. Story gets concluded -> Timejump to bookend with a nice image. That feels clean to me. Having several little timejumps of different size in there makes it feels a bit muddy for me.

Love a lot of your work, so thats where this feedback is coming from. 😃