I don't like or dislike her as a person, I don't know her well enough to have any firm opinion one way or the other.
Granted, the voice came as a HUUGE surprise once she started singing in the audition, as like most of the others I thought she was being set up as one of those deluded ones in the clip shown beforehand.
That said though, there are better singers (Shaheen) through to the finals now, as well as some other amazing acts (Diversity/ Flawless/ Julian), and its a shame that they probably don't stand a chance of winning now due to the media circus which has surrounded Susan since the first audition was aired.
Lets face it, her voice is actually pretty average, and at her age, a glittering West End musical theatre career is a non starter (not many "mature" roles for ladies, and I don't think she could get away with playing a bright young thing like Fantine/ Evita/ Miss Saigon....). Her heroine Elaine Paige doesn't do many shows any more mostly due to her age, and she looks 10 years younger than Susan does.
The best Susan can really hope for is a recording deal and concert tours here and in the US, which should set her up comfortably for the rest of her life