I will not waste your time too long... Well, what can I say, the second movie is another great a sequel to this series.
Score: 9 (It's 8.5 but as otaku I will appreciate it and can give full 9 however I would not be surprised if someone gave one point less or more)
In this movie, everything fits together very well. The characters, the background of the story, especially OST, and other elements make it a beautiful spectacle, where it's impossible to get bored. In other words, most are positive sides so I'll focus on a few negative ones.
Compared to the first movie, I think the atmosphere was less interesting. The first movie was a masterpiece and the plot was wonderful. Here most things are more obvious. In addition, the way of defeating the opponents and solution to a disaster on a ship was quite typical for anime, where our girls were a bit too OP (yes I'm talking about a way to defuse the bomb). Also I would complain a bit about the machine-dragon in the theater, because I think that cadres of him was average in my opinion. The animation itself was okay, but somehow he looked too unnatural? On the plus side, compared to the previous movie, we learn more about the world of this story, mainly about the entire royal family and line of succession, which explains a lot and is very interesting.
Overall it's a great show, you can see that the creators put in it a lot of effort. Definitely worth watching.