I enjoyed reading about TSOM.....I think my friend Darren Matthias is on this particular tour.....
I love a front curtain, too.
I like the show AND the movie - and I really like to work on the show. Why change things? It works like gangbusters if you do what's on the page. You bring a lot of audience goodwill because of the movie, and that can be eroded quite quickly if you start playing around with it.
As Moss Hart said about George Cukor's direction of A STAR IS BORN (if I remember correctly): "The firm, firm hand on the wrong, wrong note."