I'm sure she would've "kicked butt" in Next to Normal, but she was smart to choose the leading role in a successful Broadway musical versus an understudy role in a show closing in January (not sure if this is confirmed, but saw people post about getting a mailing saying it must close in January). Not to mention, who's to say she would've even gotten a chance to go on as Diana? If she did, I doubt it would have been much.
"We like to snark around here. Sometimes we actually talk about theater...but we try not to let that get in our way." - dramamama611