It’s simple, hard to game, and executable which puts it ahead of many other ideas on the topic.

But: Land above a subway station or in a main business square is worth A LOT more than the same amount of land 1300 feet away. Waterfront land is wildly more valuable than the land just across the street. In districts with front setbacks, corner lots are less valuable per square foot than mid-block lots.

And I’d really hate to own a normal mini-skyscraper 4 blocks away from the skyscrapers overlooking Central Park and have my building’s land be valued as the average of the sum of all the units overlooking the Park.

But your “dumb” idea is smarter than most I think.