"If you watch the video, starting from 2:30, you can see the way she physically moves her mouth and face. I realize it's required - at least for her - to produce excellent singing. But in the context of this very modern show, with its mostly contemporary score, singing it as if you're singing a Rodgers and Hammerstein ballad simply sticks out and take you out of the world of the play. Ripley simply made me forget that I am watching a musical."
Again, I completely disagree, and in fact, your comment that "singing it as if you're singing a Rodgers and Hammerstein ballad simply sticks out and take you out of the world of the play" makes no sense to me. What took ME out of the world of the play was the raggedness of Alice Ripley's voice and the fact that she was very frequently off-pitch. Maybe you were very lucky in attending a performance when her voice was rested and she managed to stay on pitch, or maybe you're just not sensitive to such major vocal flaws, but you must be aware that there were many complaints about the state of Ripley's singing voice during her run in the show.