This makes the Vikings a bit weaker. Right now, you can give all their ships Nav II out of the gate with either Theocracy or Vassalage and have them run circles around everyone else on a water map, but now you'd have to run them both and have a GG in a coastal city in order to get that. I guess that evens out their power, but it was fun to have. I like the changes to the Gaellic Warrior, since it gives the Celts a UU that's actually different from what it's replacing, but it's still not really all that different and Woodsman I for the Jags makes them pretty powerful, since you now have a Swordsman that can get two movement in enemy borders and there's always a lot of Forests and Jungles around while they're active. I would have liked to have seen a change to the Vassalage that they couldn't capitulate to someone else while at war with you, or at least give that as an option during start-up. Without a ZOC, forts are still pretty useless, so I can't see myself building one anytime soon.