Hibiki's character becomes more defined as people around her realize what sets her off. She's got her own weaknesses (mainly being a teenage girl) and she will fight for people she really likes. Her parents and her childhood friend are the only people that can really defuse her, though the others learn to get used to her quirks. Literature is her passion and it shows it what she likes and what she criticizes. She does learn to apologize when she starts shit without meaning to, so that's some growth. Ultimately she undervalues her own worth even when she says her own opinions. Her parents pretty much treat her acting like a normal person being an amazing accomplishment because she is the trouble child. She's a girl who doesn't really think she has a future even despite her future accomplishments. She actually is down right contemplative after one of her incidents.
Your role is to be envied and resented by the talentless. That's what it means to be talented.
Hibiki's of the belief that if you don't write you're dead as far as the world knows. But of course there is the message that there is more than just writing in this world. One minor character ends up living a rather fulfilling life when they retire from it all. Some people would rather die then live with the thought of failure. Still what Hibiki finds interesting and what she hates becomes rather clear. She likes stories that come from the heart, not stuff just shat out. Because Good Literature does not always correlate to sells well or gets famous though.
Ultimately there's a sort of catharsis with her violence. In a land as decorum based as Japan, action certainly leaves a bigger impression. Combine that with the conflicts (first in the literary sphere and now in the current light novel and anime sphere) Its the phantom reputation of Hibiki vs the real world. And one can only hope for Hibiki to win out in the end.
I don't know what really attracts me to this more than any other series I follow right now, yet I want to see what's next in Hibiki's life. I can certainly feel why this is award winning (especially when you consider its competition). The arc that became the movie won the first award, yet we'll have to see if this or the next one is the one that won the second award.