Swiss and Landsknecht soldiers engage in the exceptionally-fierce hand to hand combat known as "bad war." The long spear shafts are their pikes, which became awkward to handle if the push of pike became too disorganized. In that case, halberds and swords became the deadliest weapons. Engraving by Hans Holbein the Younger. Albertina, Vienna.
I think this should be a quite accurate depiction of pike dimensions.
I'd love to see the AI use pikes and I'd love to see the pike push. The unit is in the game but the battle tactics are not.