If we only have 30,000 people per Representative then a Representative will find running commercials inefficient in both time and money. They would have to start meeting with their constitutients again, face to face, and talking to the public instead of dictating to them.
Instead of not knowing our representatives as people, we would know them as people, they would be once again our neighbors, chosen because they share the beliefs of people in a neighborhood. It would deliver more representation to the lower and middle classes.