She got more badass. That's not the same as being strong, or worth anything. Andrea ruined anything she touched. She was the queen of bad decision making.
the 2 younger girls were doomed because one of them was crazy.
So, we have one blond queen of bad decisions. One blond crazy kid...
And Beth. Daughter of a veterinarian farmer. Probably has more sense and optimism than the rest of the blonde female cast.
The queen of bad decisions, a crazy kid, and someone who checked out catatonic.... Thus, I note a pattern - being blond is a sign of problems on The Walking Dead.
More optimism, sure. Sense? Can't say, as she's not had to make many decisions, having generally allowed others to take the lead. And until this episode she had little ability to deal with the world, up to and including attempted suicide and a period of catatonia. At the prison, her basic role is to sit back and watch the baby.
Don't get me wrong - Beth is not a bad person. By normal, contemporary standards, she's fine. Normal, sane people *would* generally check out and say goodnight under the stresses seen in the show. I do not fault her for failing to be superhuman. But the world she's in requires her to be superhuman, and that's a problematic in the narrative. It is very, very difficult to write characters that are not up to snuff, and they haven't done a very good job of it with her.
Moreover, see previous comments about romance - if she's being set up and incongruously made effective so as to make her a difficulty in the Daryl/Carol romance, some people are going to be royally cheesed off. She is *not* a fitting substitute for Carol.