At the moment I'd say you're right, but it could change in the coming weeks. If she can work out how to bring the performance level of her rumba to the floor for her other dances then I think she'll pick up more votes.
It's her lack of personality on the dancefloor that puts me off her - I find it all a bit like watching paint dry and so, it seems, do many others. As someone said yesterday, it's all a bit like dancing by numbers. Feet in the right place but deathly dull. I did, however, love her rumba. It feels like it's the only dance she's actually connected with in the entire competition and it made a huge difference.
However, if she can inject some personality into her dances then I think it would draw more people to her and she'd actually become a lot more popular and probably be favourite to win. There are lot of people whose votes change from week to week depending on the dances.
Perhaps Vincent needs to get her off to an acting coach? I know it's becoming a Strictly cliche but it did Gethin the world of good last year.