I'm not sure I get the whole "replacement" thing.
Scott replaced Megan Mullaly in GREASE.
Scott replaced Idina Menzel in RENT.
Menzel replaced Scott in AIDA.
Rachel York replaced Scott in DIRTY ROTTEN SCOUNDRELS.
Heidi Blickenstaff replaced Scott in THE LITTLE MERMAID.
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle