In truth, her age has zero to do with it. "Satisfied" really isn't a song she could nail vocally (remember where it goes, not where it starts; the ending takes the roof off with Goldsberry, and even in the mix cover.) I don't think you can approximate the big finish to "Satisfied" and make the role work. Some roles are designed such, the 1st interpreter makes an impact on the composition and how it is performed. There are plenty of hip-hop stars who could pull of much of its middle sections (and Daphne), yet fail in the end. The song needs that unique blend of pop and musical theater chops. Daphne isn't in that league, at least nt anymore. Not nailing "Satisfied," anyone is wrong for the role.
"I'm a comedian, but in my spare time, things bother me." Garry Shandling