I do a self-defense drill where we corner the women and they have to fight us off while avoiding being cornered. Always make movement toward the escape, no matter how small the movement is. When an opportunity opens up go for it.
I won't second guess the woman, could things have been done better. I think that's always the case. Did she do the right thing? Well she made it out, so she did the right thing.
If I remember correctly I think the most important lesson that actually saved her, was the understanding that it didn't have to be a fair fight. Many of the female students are afraid that they care going to hurt the guys. It's not until they actually give the guys a good kick or punch for them to understand that it takes more than what thought to actually hurt someone. Once the lady in the article understood that it didn't have to be a fair fight then she probably felt fine and justified for attacking the guy in the face.
As for scratching the face, there is no technique to that. It's something that most people can do with no problem. You don't need to go to a self-defense class to learn that. The self-defense class probably put things into perspective. It made it clear to her that when it happens, it's a fight for your life, so don't feel bad about the guy or woman that's attacking you. If a self-defense class can get women to understand this then, women are more likely to survive. It's better than the other perception of: Maybe if I don't fight back he'll feel bad about what he's doing and let me go or won't hurt me as much.
If a self-defense class can get women over this mountain of being afraid to hurt someone
And make women attack with this type of effort, then the self-defense class is well worth it. While this lady did a good job. Look at the reaction to the women in the background, you can see their body language and it's clear that they don't have the stomach for violence yet. They aren't even being attacked you can see the "turtle" appear.