I think that Abby is so stressed on this episode because of her lawsuits. She does seem to be at a breaking point, but If I had to deal with Holly, it would break me, as well.
I did not find Nia, JoJo, or Kendall's auditions very good. I thought Maddie, Mackenzie, & Kilani had a fresh look and their personality fits better with the kid/teen shows that are popular right now. Which makes me agree with what Abby said earlier, that those three will be the only ones booking jobs in LA.