I don't think she really has a Broadway voice (like Lea Michele for example) but good for her
I don't think we've heard her Broadway voice. Many singers have a different Broadway singing style. Look at Aubrey O'Day or Nick Jonas. Their Broadway vocals were WAY different than their recording music vocals.
She doesn't have a traditional broadway voice but I can still see her slaying the role! Let's hope her acting's up to chops. I'm hoping it is, because Broadway, unlike Hollywood does not dick around when casting important roles. If she didn't have the talent they wouldn't cast her.