Plays, books, and movies are always adapted to fit the media. Many times this can be an advantage. Modifying the story is a producer's privilege. The photograph was superb. And the period consumes gave a feel of authenticity. The kept the Andrew Lloyd Webber/Tim Rice musical pretty much in tact. However when Madonna usurped "Another Suitcase in Another Hall" this contributed to the loss of the consistency of the story.
The addition of the Navel Cadets' revolt was a good touch and improved on the authenticity of the story. However, the essence of the movie like the play is the singing. Madonna is the only person that has no range, and cannot even talk through a song. If only they dubbed her, the movie would be worth viewing. Maybe they can adjust this on a DVD.