isn't the rosier glasses view from Get Back, while possibly biased the other way, a better depiction of that time in their careers?
Yes, I would think so, but I'm still looking forward to comparing and contrasting the two. (Hey, that would make a great school assignment.)
What is Disney doing with it, enhancing the quality of the video/audio at all?
Peter Jackson is remastering the original footage. From The Verge: "Like the docuseries The Beatles: Get Back, Let It Be will feature original film footage remastered by Peter Jackson’s Park Road Post Production and remastered audio created using the same de-mixing tools that recently led to the release of the Beatles’ final song."
Given that I've seen only a bootleg, I'm looking forward to the remastered version.
Looks like it will indeed be released for streaming on May 8:
https://www.usatoday.com/story/entertainment/music/2024/04/16/beatles-let-it-be-documentary-peter-jackson-disney/73340860007/