Japan's changes are very different from what I expected, but I am happy to see the changes. Starting next to an atoll will be incredibly advantageous for Japan's early game. The Samurai's change is rather odd to me, but, as others have mentioned, it will be useful after conquering coastal cities.
The Zero remains. No matter how many Unique Unit polls we make, the Devs just don't see how pointless this unit really is. While the no oil prerequisite makes it a bit more viable, I personally would have just liked a new UB. I have to say though, the Devs have made Japan work as an isolationist Civ and the Zero does fit into that theme.
Germany's boosts are very nice. The UA is still meh, but the Hanse will really make Germany shine.