I'll bite. What cliches does the show avoid? And how is it complex?
anime cliches it aviods:
stupid fan service (boobs, panty shots etc.)
the tsundere characters
the mysterious silent guy
the emo strong lead chaarcter
the " i will overcome everything because frienship"
no stupid jokes
heroes being ridiculous wimps yet turning into amazing strong leads
no giant robots
no 11 year old girl who is somehow stronger than all the grown up males in show
it's complex in the sense of how depressing it its. the show clearly foreshadows there is no happy outcome and you clerly see it and the desperation onb the faces of the characters, which makes them more human.
it also has some interesting ideas on it's own regarding what is considered living vs. mearly existing.