I full truly and always will love and defend the Newborn. In fourth film of the franchise we thought we've seen it all and knew it all too well and then BAM! Newborn appears! Disfigured, grotesque yet sentient and, idk if it's good phrase, relatable to. His mimics and eyes made him sad and lots on one hand and attacks of aggression, scary as f**k on the other. For me the live and fate of Newborn is tragedy also for Ripley because finally the only thing like her, related to her in whole universe is this innocent little monster she has to reject for good of corrupted mankind. God damn it, THAT was one hell of an ending!
On the technical side I'm with SiL. Newborn is animatronic marvel and should be acknowledged as such.