It's a change of pace, and I really appreciate that. Almost every AAA title out right now, in addition to upcoming releases, seems to be taking the gritty, realistic approach. This differentiation will continue to set them up for awhile as well, because the stream of gritty, realistic games doesn't seem to be slowing down. Also, I think you're underestimating how "adult" Destiny will be. While from an aesthetic standpoint I suppose you could make the argument that it isn't very gritty, but as the saying goes: "Don't judge a book by it's cover." I'm fully expecting Destiny's story to incorporate many darker themes.