After reading all the long (but interesting) posts that are associated with your idea, I have to say the I am thoroughly amazed at your concepts. I would play this game. I do have one thought though. Instead of modifying the subclasses, just create new ones (cryo) and have each class have a different variant of the quest to get it. Otherwise, very awesome concepts, as doubtful as it is, I'd like to see Bungie use some of this (and give you credit)