That's true but not entirely comparable because Europe is enlarged and the Netherlands have to sustain an entire civilization. I too would like Pittsburgh on the map, but your solution looks a bit too invasive to justify it. But I haven't tried my own hand at it.
Likewise, a northern Boston is odd to me. I tried for far too long to get Boston, New York, Philadelphia & Washington on the map but it looked awful.
With the extra tiles, Detroit & Pittsburgh can each get a full ring while NY & Boston still have 5+ tiles to the north to work plus coasts.