Odds of Maxis adding create-a-world like sims 3?

As far as editing tools, I remember one of them answered in one of the question threads a long time ago, that even moving a trash can in the open space could ruin a player's save (why they couldn't patch such stuff) when it was pointed out one was in a wrong location in WC. They were ask why we can't edit the worlds. IRC that was part of the answer because harm to saves.