Question, for those actually knowledgeable about these things: As I understand it, underwater mechanics are tied to land levels. Meaning, once a character moves below a certain point on the y-axis, they start "swimming" and so on. Do correct me if this is nonsense. But if it's not, wouldn't new and expansive underwater content be severely limited from a programming standpoint? There could be no domed cities to walk around in, no sea floor to move about on. I've seen many such suggestions, and they sound interesting but, perhaps, impossible. Which might in turn make the whole potential expansion less attractive, at least for some current proponents.