The Grace of Kings feels long from the very start. Ken Liu is starting off from a fictional empire of seven islands, but it might as well have been a historical book. Everything is mostly realistic, with very human characters that do what human characters do: harm and kill other people and find rationalizations for it. Some of them are heroic and occasionally think of other people, too.
Half way through the book (which is one of a trilogy, of course) I couldn't keep up with all the characters that kind of did the same thing, the long expositions of why people did stupid or horrible things to others and the various anecdotes that made some of the characters heroes or villains. And I call them anecdotes because that's what they feel like: short moments that disrupt rather than enforce the long and unfortunately boring history of the realm.
Bottom line, it feels like a Chinese Game of Thrones, with less interesting characters and no magic as of yet. It's not badly written, quite the contrary, but its subject is long winding and doesn't interest me. I will therefore abandon reading it.