No, Dorian doesn't change...because people have hurt her. And Sloan and Viki are both selfish people who hurt Viki's kids. If Wanda needs to natter off and run her mouth about Dorian's wrongdoings, then she needs to scream at Viki and Sloan also and to refuse them service also.
Wanda was stupid here, not loveable. Wanda should also be berating Viki and Sloan for their selfish hedonism and Sloan for writing that horrid book slandering Dorian.