This is a dystopian world and much is unexplained. Are the rigid controls necessary? Are Honor’s parents just selfish reckless idiots? Is the ending happy or unhappy? This is good and can be read in many different ways.
This is a good adventure tale. It starts out as a glorious what-if about the Victorians possessing anti-matter but as the story progresses you realise this Empire is a nightmare world of Imperialism, a shifting balance of power and toxic hatreds. This is good.
“To set foot on another world was surely the most significant achievement in human development since the Ark – or, if Sir Charles Darwin is to be believed, since our monkey ancestors desisted from hurling bananas at each other and climbed down from the trees to walk upright on the land.”