I disagree that "Fiddler on the Roof" was better in the movies. The stage musical always makes me feel the warmth of the characters, whereas the more realistic movie setting was just too grim.
I thought "Les Mis" was an incredible film, and definitely agreed with the change in the order of the songs. Here, the grittiness of the first scene was a boost to the story, because of the contrast to JVJ's later life.I also liked the new scene with the new song, "Suddenly," because it made clear what is ambiguous in the stage show: Is JVJ just trying to fulfill his promise to Fantine or does he feel like a father to Cosette? On the other hand, the presence of Monsieur Crowe as Javert was, shall we say, not as successful as much of the movie.
I think the "Mary Poppins" movie was superior to the stage show, despite the incredible dance scene with the magnetic boots up the side of the stage and across the top. The mixture of live action and cartoon in the 1964 movie was revolutionary. I also thought the addition of the first nanny in the stage show was obnoxious, which diminished the performance for me.
I think the original stage version of "My Fair Lady" and the 1964 movie are about equal, possibly because of the almost identical translation from stage to screen, and the repeat casting of Higgins and Alfred P. Doolittle, as well as Cecil Beaton's return. I'm not as enamored of recent stagings of "My Fair Lady." Eliza's new Ascot hat is looney -- almost as unusual as the Royal Family's 21st century hats.

Also, the addition of the subway, which replaces the taxi when Eliza returns to Covent Garden, is odd -- Freddy still arrives in a taxi, so how does he know where to find her? I do like the idea of Freddy being drunk, instead of just love-besotted. But, as I've complained numerous times on this board, what's with the ancient, professorial Higgins? The new casting just doesn't compare to the forty-something "Sexy Rexy."
I've heard that Keira Knightly was taking singing lessons for a My Fair Lady remake that was supposed to be more gritty than the 1964 version. No thank you on the gritty part. If Keira can pull off "I Could Have Danced All Night," without being dubbed, she'd be a good choice. I'm not sure what happened to that project. It may have fizzled.
You alone can make my song take flight.