I had always assumed for a long time that the puffy ack model would eventually get a revisit because it was so unsadisfactory IMO. As previously stated, it should calcuate and lead a target based on its course and speed, wait an appropriate delay based on range, and then go off. Given the depth of other models it the game it's counter-intutive that it's a stupid box that follows you around regardless of what you do. Only took my first week in the game to realize that the latter was in fact the case.