I don't know if she will be successful or not yet, but I think she has the potential. She looks good, she can definitely sing (people should judge her by her 3 best vocal performances on the live shows and not by those she messed up the most - Clarity and 2nd half of Let it go were her for me her worst performances vocally).
I would love to hear some of her performances now that she is doing random gigs like the rest of the contestants, so I would know if she has made any improvements already. She has to improve her vocals a bit so she can hit those high notes without any problems every time and do something about the stage presence (it never bothered me when she just stood there, I only wanted to hear her vocals).
I have a feeling Only the young, Ben and Fleur will be successful (I didn't and still don't care about any of them because there were better singers than them this year), I am not sure about Andrea, Stereo kicks and the others yet, we will see.
I think she will get signed though.