I hate how one of the biggest problems people have with the FNC story/mythology is "Oh no, I actually have to pay attention or I won't know what's going on!" RPGs are games supposedly lauded for their stories and people balk at the idea that they have to make a slight effort to keep up with things. XIII wasn't a perfect or amazing game, but I think a lot of its reception reflects negatively on the community and not the game itself.
When people complain that they don't know what "l'Cie" or "fal'Cie" mean, despite how heavily it's explained and beaten into the player over the first couple hours of XIII, I don't fault the game or its writing, I assume the person complaining is either spectacularly impatient or moderately brain-damaged.
Also, what's wrong with that line? People in a fantasy world speaking like they're in a fantasy world? Why is it that if a character speaks anywhere over a middle school English level, they're suddenly pretentious? Reminds me of "Idiocracy."