I love your enthusiasm for Sutton, and she is indeed very talented. But I don't think she would be a good Mama Rose because she does not have the physical stature for that part. Further, Sutton is like an energizer bunny -- but in a youthful way, She reminds me of Mary Martin who played" eternally young and charmingly naive" even in her late 50s in I Do I Do. Sutton has more gravitas, for sure, but not that worn out by life quality that Merman had and that Lansbury could act. That's just my opinion, and I could be wrong.
Sutton needs and deserves a great original part that explores her dramatic musical talents, a new show, a new journey -- not a Boop, not a Smash, not a Redwood or Queen of Versailles, something with character and depth, not something superficial or a warmed over movie. She's more than Reno, more than Millie, and more than Drowsy Chaperone.
Gypsy has been revived too many times in the last 10 years, not longer an event. Both the Patti and Audra productions tried for a "legendary," and both lost big money. The recent version with Audra who certainly acted the part brilliantly lost its full $25 million. Gypsy cannot be done with reduced orchestrations and concert sets with everyone in underwear and Herbie getting slathered with paint for. the curtain call -- the show demands that vaudeville-burlesque ambiance, and that is expensive. Styne's score screams full orchestra. So I doubt we will see a full production, maybe a concert version at Carnegie Hall, but not on Broadway.