"Sadly, to me, most of today's theatre creators are recycling someone else's creative ideas without any individual stamp"
Which is also true of most of the musicals of the Golden Age. Look at the endless parade of musical comedies that followed exactly the same structure and style. Even Rodgers and Hammerstein recycled what worked into another show to make lightning strike twice.
"I just want to change the art form that I love for the better"
The art form will evolve and change due to a series of events. It cannot be changed by one person (no, not even Sondheim could do it alone). Do you want to change it in general, or try to force it to be something it used to be in a completely different social, political and economic era?
"There was a time that Broadway was equal with the television and movies and didn't need to take hints from it."
And at that time, television and movies were not as abundant or accessible as now. And back then, most of the ideas for musicals came from novels or plays. There were not that many more completely original shows than now. There were many more shows being produced, but there were also many more flops.
"I always wanted a Broadway that was all the wonderful things I had listen to and read and watched."
Then what you want is something that cannot possibly exist any more. Not unless you have a time machine.
"Unlike most my age I was brought up on the Golden Age musicals simultaniously with current Broadway and Les Mis and Rent never thrilled me the way that Gypsy or Follies does."
Then I'm sorry for that. I found both Les Mis and Rent to be thrilling, exciting, original milestone musicals for Broadway and I've studied it twice as long as you. Could you not just see them for what they were rather than what they weren't?
gherbert - I know what you're trying to say, but you need to apply your knowledge of the past to the audience of the present and the future to understand how the art form is progressing and to make a proper evaluation. It's like trying to force Marilyn Manson fans to embrace barbershop quartets. It's a different audience at a different time with different interests and tastes. It's one thing to pine for the way things were, but it's another to expect things to change back to the way they were and to try and compare now with then. It seems you have nothing but a pessimistic view of current musical theatre that can never change until it reaches some impossible expectations that were set it in an era that no longer exists. Brace yourself for the possibility that it may never happen.
"What can you expect from a bunch of seitan worshippers?" - Reginald Tresilian