A mistake CM has made is that they haven't developed the characters and they haven't developed adversarial relationships between the men and women to any significant degree. Viewers need to be able to identify with a character and sink their teeth into a storyline. Think soap operas. Think professional wrestling. (I'm not suggesting they script a fake storyline. That would kill the "reality" aspect of the show. I'm suggesting they allow camera time for the other models to step forward as they've allowed camera time for the twins).
Barbara is probably the only woman that the majority of the audience knows by name. This is because she's had uncontrollable outbursts of craziness. Perhaps Danielle too as she has a running feud with the twins which usually ends up with both of them slipping on the floor or fighting over a pie.
Likewise, all the men are replaceable except the idiot twins.
I don't think the young female audience digs the bearded musclemen models. Young females tend to prefer non-threatening, baby face thin boys like Justin Bieber.
It's much more compelling television when a character you're involved in is humiliated with a pie as compared to a personality-free model whose name you don't even know. Even if that model is exceptionally attractive.
When Barbara was penalized and received two pies that was the most compelling moment in the show. Every viewer who follows CM closely was waiting for her to be completely humiliated. Because we dislike her so much!! There's not much more satisfying in WAM than a "Bad Girl" being hit with a pie!!
In short, CM needs to hire more crazy female models with big mouths and give them camera time to create conflict with the men (and perhaps the other women!!).