This show is playing to 80% because of the performances by Laura Benanti and Patti LuPone (and Boyd Gaines and Leigh Ann Larkin, but Benanti and of course most importantly LuPone are the reason the show is doing any kind of business). To use Lenora Menetz would be pointless, even if she is brilliant, the reality of the business is she hasn't been able to have the marquee name that every single woman who has played Rose on Broadway has.
Unfortunately, I don't think there is any marquee name who would replace LuPone. Talk about a tough act to follow!
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"