Nicole still isn't right for the role in the more traditional sense, she works for this very production. I don't think she has the gravitas and acting talent needed for Norma in a movie, or more traditional production.
Glenn acted the role like no one else, her reaction to the spotlight hitting her before AIWNSG will stay with me forever. Spine tingling. Norma is very much a role driven by acting, if all you have is vocals then much of the power and pathos is lost