I could def imagine Lea making a wonderful Elphaba... but I'm pretty sure she has no intentions of leaving Spring Awakening to do so :) Its just a dream role of hers, as she stated in an interview a while back.
but yeah, I'd kill to hear her I'm Not That Girl- it would be so hauntingly beautiful!
(oh, and while I can totally see why people might guess her voice wouldn't be powerful enough, we can't really judge that too well, can we? I mean, she could have a terrific, powerful belt but it just doesn't come into play in Spring Awakening, you know? I wouldn't put it past her to have a lot more vocal power than is shown from the songs in SA :))
I don't need a life that's normal. That's way too far away. But something next to normal would be okay. Something next to normal is what I'd like to try. Close enough to normal to get by.