From what I've seen from most people who have already completed the game of various different political views and backgrounds...
Abby is not likable. They seem very tone deaf to everything concerning her from even before Joel dies where she murders and tortures him in cold blood without a second thought after saving her life to even her own chapters in the story. When her chapter comes, everyone is pretty deflated when they realize they need to play as her, and everything falls flat. Which she does good things in the game, she's also extremely cold and easy to anger and the crux of her sympathy is that Joel killed her dad, which is negated by how horribly she murders him. As a result, you play as a character you don't like and you can't sympathize with her because she went way overboard and seems absolutely manic and thrilled to commit all of her violence. The reason you haven't heard much about Abby as a character is because nobody really has much positive to say about her. She's a bad person who continues to do bad things and barely shows humanity.
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