The ability and imagination to create and immerse you in a complex, but credible fictitious future world was superlative. Technically I would rate it 5 stars+.
Better still the computer animated Avatars convinced you to immediately accept them as real people with emotions and attractive human traits, despite their out-of-world appearance. Again 5+ stars.
My only complaints are: a) Too many dimly lit scenes - unfortunately common in such animations b) Way overly-long and repetitive battle scene - although a technical tour-de-force, one quickly yearned to get back to the fascinating "people" aspect that was the strength of this Sc-Fi movie and leaves acres of room for further, even more subtle exploration