"The Miller's Son" is a wonderful song. It is a portrait of an entire life. Unlike the other characters, Petra is earthy, uncomplicated, and knows what she wants. From my point of view, there are two major problems with the show. The show has two beginnings, the sung overture followed by "Night Waltz." Also, Steve and Hal never made up their mind about the five people who wonder around. They have names, but who are they? Are they neighbors, townspeople, gossips?
Off the top of my head, there are two other songs, like "The Miller's Song" are a portrait of an entire life. In Follies, it's "I'm Still Here." Unlike other characters, Carlotta does not live in or cling to her past. In Pacific Overtures, it's "A Bowler Hat."