Ado Annie D'Ysquith said: "Forgive me folks, I meant no disrespect or offense. Cinderella is my favorite fairytale so I am a little protective of its adaptations! Hahaha...I happen to love both the R&H and Disney versions, as well as Into the Woods, but my concern is Webber's hit-or-miss record with his shows. For every Phantom or School of Rock, there's a Starlight Express or Woman in White."
Loving the story is one thing, but it seems a bit odd to be protective of adaptations when it has literally been adapted thousands of times in books, music, movies, stage, and countless other ways.
Also, don't forget that Webber's Starlight Express was a huge hit for him. It made him several million dollars and earned him a few nominations for major awards. It ran for eight solid years in London from 1984 to 1992 in its original incarnation, and the in a revised incarnation from 1992 to 2002. That is an 18 year run in total, making it the 9th longest running West End show. I don't think that makes a very great example for your argument.
Furthermore, when you look at Webber's body of work, he has many more successes than he has flops. His "hit-or-miss record" that you speak of is certainly more hits with very few misses. When your list of hits include Joseph, Jesus Christ Superstar, Evita, Cats, Starlight Express, Tell Me On a Sunday, Phantom of the Opera, and even School of Rock, I think a couple misses here and there are acceptable. Even Rodgers and Hammerstein had their flops.