Team Joe here too now.
AB is tricky. I'm not a fan, but I do wonder what makes her so different from other celebs, and I really do think that she very rarely comes across as being interesting/having personality/a sense of humour. Much like Mollie - but I think she's staying in because people want to see if her and AJ will snog.
She comes across as insincere/a bit X-Factor. So where some people (i.e. Susan) talk about how much they love being on the show, when AB says it, it sounds like it's something she's saying because she thinks she should. Debbie looks interested when the judges speak to her, and (I know it might sound daft to say) it looks like she takes in criticisms when they come her way, and she actually looks properly happy when she gets praise. And again, a lot of other couples genuinely look like they have a good thing going with their partnership, which is obvious and lacking for AB and Gorka.
Ironically, I think if Alexandra cared less about how she came across and was just herself, assuming there is a sense of humour in there somewhere, she'd probably get more of the public vote.