Sutton is definitely more of a Nessa type... and it's within her range.
Sutton isn't really a mixer, which is, ultimately, required for Elphaba. She has a pure chest belt that, when used, is hair raising, and brings down the house (Gimme, Gimme)... She's in the range of Merman, and Testa... She would definitely wear herself out in this role.
She is not the right type at all.
She's the quirky, Carol Burnett type, comedienne.
Which is not to say that it wouldn't be fun to see her in this role... but I'd say Sutton wouldn't even want to do Elphaba...
Personally, I think I have too much bloom.