The trouble with Broadway....
I have no problem with musicals being derivative. They always have been; Oklahoma, regarded as the first modern musical, was based on the play Green Grow the Lilacs, My Fair Lady was based on Pygmalion, West Side Story was a retelling of Romeo and Juliet (which itself used the same plot as earlier works), etc.
But here's the problem: the train of thought used to be, "Let's base a musical on Don Quixote and if we do it right, we'll create great art and make a lot of money." This approach gave us Man of La Mancha, one of the greatest shows in history.
Now, the process seems to be, "Let's base a musical on a Puccini opera and we'll make a lot of money." The concept of doing it right and creating art seems to have been removed from the equation, to be replaced by gratuitous special effects and a deafening score.
My motto: "No helicopters".