I can't think of another musical that ran over 1500 performances and was a huge commercial success and yet had a book that was quite inferior to the play it was based on. Apparently it was Angela Lansbury's spectacular star-making performance, the excellent score, and the fine supporting performances of Arthur, Connell, and Michaels that made the show such a big hit. When it was revived in '83 with Lansbury and 3 others from the original cast, it was a quick failure. When I saw my first production of Mame in '94, I was surprised that the book was nowhere near as good as the film.
Paula Scrofano in the 90's was the go-to actress in Chicago for many lead roles in musicals presented by theaters like Goodman, Marriott, Drury Lane, and Theater at the Center. She was quite good as Mame in the '94 production. In 2001 she was really too old to play Gooch, but she did a nice job with her 2 musical numbers "St. Bridget" and "Gooch's Song" and got all the laughs that came with the role.