Please --- Sit Down John is great, and it fits into the story of John Adams being not well liked. I saw the stage play in Chicago, and I can tell you that the Molasses to Rum to Slaves song was, what used to be called, a showstopper. It was intense to see live.
I never saw the stage version, which I expect I would have liked better. To me, the movie 1776 felt like a filmed version of a stage play, which often leaves me cold. My favorite movie musicals (like, say, Sound of Music) don’t feel like a filmed stage play.