I’ll be quick: it’s very well done. The Williams cues (great choices !), the sound effects, the shrink edit idea to “frame” this entire “SW short story” with Vader (which by the way tends to solve the theatrical version issue of Vader in R1; here he’s more a secondary character rather than just an extra who shows up at the end to kill random people), etc. I like it, it gets the job done to continue the Vader’s tale from Episode III to Episode IV with a side-story than just the story of characters I don’t care about (Jyn et al.).

Just a few issues:

the sound is lacking punch, but I understand the 5.1 version will come later
the image quality is a little bit too compressed
maybe you should extend the end credits in order to keep the music entirely
the first OT Vader’s line is jarring since he sounds very young compared to the nowadays James Earl Jones (but the second OT line is fine, nothing jarring)
the first PT cue when Krennic’s shuttle flyes to Mustafar represents Kamino, why didn’t you choose Ep III “Enter Lord Vader” instead ?
I wish you had managed to cut CGI Leia as well as Jyn’s line about “figuring out” how to retrieve the plans (it would be better to make her sound as if she knows where to search and how)
in the opening crawl maybe you could add a reference to the end of the Clone Wars and the very long time until completion it took to finish the Death Star ?
like I said in a previous post, when Donnie Yen goes to the master switch it would be the perfect moment to implement a flash back of his encounter with Jyn, in order to keep the info that he’s a guardian of the whills and not a Jedi (I take the perspective that your edit should/could work at 100% without knowing the original theatrical cut).

That’s being said, I think your edit is clearly going to replace the theatrical version for me 😃

Thanks for sharing your excellent work (your Hobbit edit already was a huge improvement over the theatrical version).