I disagree that Susie hasn't changed since she's been in there. I think she really DID have a mask for the first 2 weeks or so and then she let it down. I liked both sides of her, before and after this slip. Before she reacted with exceptional composure when Grace did what she did to her. After, she has become a slightly tetchy older woman with no time for the other housemates' games - however, her worldly wisdom has shone out since she dropped the early act and she's become a woman that many of the housemates seek out for advice.
Overall, I think she makes a smashing housemate and I hope she stays in till the final.