A few thoughts:
One of the changes that they made from London to Broadway that I didn't like was that they tried to "toughen up" the show. Joe asking for work and saying that he'll work on any piece of sh*t. I recall a few added "Bastards". Not in keeping with the spirit of the source material.
I thought that one of the reasons why the first national tour failed was that Norma wasn't played by a "Name." I remember reading that Betty Buckley thought that she'd be asked to do it and was surprised when she wasn't.
About the tour with Petula Clark, she was really, really, really not great. She was using this bizarre midwestern accent. As if Norma had no talkie film career because she sounds like an Okie. And I didn't think that her singing was all that great. Her elocution was horrible.
One thing they did that I always thought about doing with a Lloyd-Webber show is treating all of his recitive as dialogue. ("Aspects of Love," which is available for stock and amateur productions from the Rodgers and Hammerstein Organization, desperately needs this treatment.) One interesting thing about this treatment is that one of the songs, "Boy Meets Girl," was basically eliminated.
"A coherent existance after so many years of muddle" - Desiree' Armfelt, A Little Night Music
"Life keeps happening everyday, Say Yes" - 70, Girls, 70
"Life is what you do while you're waiting to die" - Zorba