The optimus bots seemed laggy. I thought the non verbal communication really suffered compared to a human using fingers and eye contact. The smoothness of the optimus movement was at odds with human movement - delicately but quickly darting around.
When a human makes eye contact with you and signals something with their hands - it is so responsive that you are certain that they are talking to you. With the robots, it was ambiguous.
Did someone put a low pass on the movements on top of a laggy remote control loop?