The lyrics, for us, lack something. They're sometimes overly simple and just don't express what we'd like to hear ... though, from the comments on her Youtube link, it seems that others have taken this as a purposeful act in order to be on the same level and really allow her (possibly) less intuitive audiences to really gauge how she is feeling within the track.
For many people, the performance will be the main factor in why this works, rather than those pesky lyrics. In this respect, as always, Rebecca does very well. She comes across, still, as a respectable, impressive, powerful woman who bears similarities to Emeli Sande ... although the timid-ness she also possesses makes her more realistic. Her power is in the distinctive way she sings and, from what we can hear here, there's absolutely no doubt that Rebecca will, once the wheels are in motion, have another success story on her hands with the album, Freedom.