He said that Charles was one of the very first people he met in NYC when he got out of the Navy. They met because Reilly was doing a play with Morse's brother who at the time was pursuing an acting career. (I don't know anything further about the brother.) And Morse pretty much begged Loesser and Burrows to audition Reilly (a situation Reilly talks about on the reissue of the OBC that includes cast interviews). I would tend to agree that perhaps he was too big and maybe too gay for the movies then. I certainly remember his "unique" personality from the series "Ghost and Mrs. Muir" and what an impression it made on me as a kid.
There was discussion about "Coffee Break" and how the footage seems lost forever but no real discussion regarding other cut music. I don't think Morse had any involvement on the creative side of things like that, so he really knew very little. He wasn't even sure that "Coffee Break" had been filmed. He did say that Michele Lee insisted she would only do the film if they gave her the solo with "I Believe in You". It worked storywise for me, but I can see how she held out for it since so much more of her music was cut. And i have to say, Maureen Arthur is so very funny in a way outdated character role.