1. I have always believed that the invention of movies has been to provide the public with an escape from the daily hum-drum of life. If only to provide for profits, the goal is to sell the fantasy. The early musical was to bring Broadway to everyday man. It is this reason why so many of us enjoy movies.
2. I think that other themes that could be included in the Depression - Era musical would be the lascivious way that the star lived. The lack of seeing the affect of the depression on the theatre is in itself a theme.
3. I think that if this musical was made before pre code it would have included more skin in the appearance of the female actors. There could be more use of profane language and scenes that reflect the time in a more realistic manner.