On higher levels (especially on Deity), you can build 3 cities, and conquer the capital of the neighbor as a 4th city. If you do this before you get the finisher, when you do get it, the free aqueduct goes to the former Deity AI capital, which in a sense gives you two really good cities (the two capitals), and another 2 fairly good ones.
That's what I mostly love about the new finisher. And of course, the Legalism fix was much needed.