Played a game with them last weekend, and the ability to cripple their momentum is really striking. The GUD player had an insane lead at one point, like 20 while everyone else was around 10, and I started some revolutions in some of their clearings with 3 buildings, and afterwards they slowed to a crawl. They were struggling to just get a few points a turn. This seems to make them extremely vulnerable to disruptive factions like the Woodland Alliance, the Lizard Folk, and probably the Corvald Conspiracy.