I disagree. I say this because she has a very common type of voice, that is technically usually in tune but not particularly versatile ,is quite limited,and can't handle much stress.She has fewer strengths vocally than some others in the competition.(Fact, not opinion)
Having said that, she knows how to use what she has to maximum advantage and her breathy, affected, quirky vocals suit the genre and style she has adapted them to. She is usually in tune, and has a sweetness to her tone. She has potential to be marketable, and obviously a love of music and evidence of real dedication, which counts for a lot and could help her outlast some with stronger voices but weaker wills.
I can see her appeal, and appreciate her talent and ability to know what she can and can't do.She has a spark of creativity and genuineness , too.