Human interaction is terrible. All the characters are flat.
Too soon...
Individuals in the series largely act as if their personalities have been hit by the dual vector foil.
But the series is rarely about the individuals. Instead its about exploring how humanity - and aliens - might react to the existence of one another.
In this regard I feel Liu created in the reader a vertigo-inducing sensation of depth.
I wasn’t trying to be dismissive, although it’s not entirely my cup of tea; my comparison to Asimov is meant as a compliment.