I watched my sister play through the game a little while back. She went in blind, and was intimidated by the abrupt media res introduction to the game, and the poor handling of exposition, but she generally followed what was happening, including the jargon terms.
Then the end of the game occurred. She professed to me she had no idea what purportedly happened. Why were they even acquiescing to the villain's desire to fight Orphan and kill him anyway? How were Lightning, Sazh, Snow and Hope reverted to normal? How and why did their Focus change? Why were they de-crystallised, and how? How did Fang and Vanille know that Ragnarok - an engine of destruction - would be able to save them, and in the way it did? I had to shrug my shoulders and tell her, without revealing the little FFXIII-2 spoiler that Etro did it, that the characters simply believed hard enough in hope and friendship.
And looking back at that ending, I firmly believe it is the one time that FFXIII's story is ever genuinely a struggle to comprehend. Would differing mindsets among players be a factor too? Would a Japanese player be more naturally inclined to expect anime ideas of hope and friendship overcoming the darkest of odds, compared to a western gamer who may be more inclined to expect a more logical conclusion? Thematically it is also bizarre. They seemingly accept their predetermined fate by killing Orphan...only to inexplicably defy it moments later through no tangible agency of their own.
Am I even making any sense here anymore? >.>