Again, just because Kristin played the part does not mean she played it well. I admit that I forgot about her performance in "The Music Man." No, she did not have the "Ditz" tone. However, I found her to be stiff to the point that it just did not seem real. I still cannot see her as Gooch. In the roles that I have seen Kristin play, she is not shy, and I cannot see why people believe she would make a good Gooch. Would someone try to explain???
As for not seeing Donna Murphy as Mame, I almost understand that if you did not catch her in "The King and I" or "Wonderful Town." If the only show I'd seen her in was "Passion" then I probably could not have seen her as Ruth Sherwood. Perhaps that is the reason you can't see her as Mame.
"Life beats down and crushes the soul and art reminds you that you have one."
-Stella Adler