Honestly, Cilia, I don't think it's solely Jungian psychology. You're putting a lot of emphasis on Jungian shadows, but there's definitely some Freudian psychology in there as well, with the conflict between the Super Ego, the Warrior of Light's outer face that submits to cultural demands, to Fray's Id, more closeted, counter-cultural part of your mind that wants to act on its own.

In case it isn't clear, I do agree with you, though, I'm just debating semantics and hoping to offer a new viewpoint. I don't see how it's a reference to FFVII at all; it's just another type of mental breakdown under stress.