The Question and Answer section for Master Harold… And the Boys is a great resource to ask questions, find answers, and discuss the novel.
Sorry, this is only a short answer forum space. Your question is too detailed.
Unfortunately, I have never heard the music in a production.
Of the three characters, Willie changes the most. After observing the altercation between Sam and Hally, he realizes that he has been mistreating Hilda and should change his behavior. This is a clear reversal of his earlier, stubborn statements...