I read this article on the same day that the piece on Stanford acceptance rates hitting an all time low appeared on HN (https://news.ycombinator.com/item?id=5464115). If tier 1 schools have a relatively stable student body size and an increasing number of applicants, I don't see anything happening to make them seek out even more applicants. Urban / rural geographic diversity is probably pretty low on their priority list compared to other diversity goals.