First off, I love the series been playing the 1 and 2nd installment since they came out.... even own 3 copies of the 2nd one, 2 regular and 1 Gold edition, anything to support a company like yours!, just wish I could have afforded the Founders edition :'(
TLDR: Galacitic Domain is bugged, gives npc's a huge advantage, and ZoC Colonization only means that the ship has to be in ZoC not the target planet.
So, I just started up my first game of Galciv 3, and i am awestruck at the details and the improvements to the Ship Designer! I am sat here playing and the United Planets convene for the first time, to vote on Galactic Domain, unfortunately... because this means I am stuck unable to colonize any other planets outside my Zone of Control (ZoC), while all the other races happily colonize away, to combat this I need to build a constructor, to get ZoC before I can colonize any planets inside or in one of the squares just outside the ZoC meaning my Colony Ship has to be inside my ZoC to colonize a planet, which can be just outside of my ZoC.