I think this is a fantastic idea and I would love it. I feel like some of the Lot traits already in game should actually be more like neighborhood traits because, especially in the houses that are indeed in the same neighborhood, it makes little sense why one would have the Great Schools lot trait, and another wouldn't. They're in the same neighborhood, and thus realistically affected by the same Great Schools. But, if you want to create that idea as it stands in game now, you essentially give up one Lot trait that could be used for something else just to establish continuity. I've been thinking about this lately as I've been going through doing Maxis renovations...