Two direction attacks requiring two block directions would be OP, I remember the horror of trying to face off against a Chaos longspear wall when they had 2 attack directions in battle. Compromise might be to give pikes and longspears a secondary mode, still using a thrust which requires a downblock, but make it overhead and perhaps slightly reduce speed and damage. This would make it a lot easier to maneuver it around friendlies, especially on sloped terrain where it can be a real pain. Would also make it easier to hit cav riders w/o a clumsy jump.