One of those things which really surprized me in original Mount&Blade was the fact that the spear was the only weapon which one could use to perform couched damage. I'm not really medieval warfare expert, but I'm quite good in 18 century and napoleonic battles, where heavy cavalry were widely used.As an example, french heavy cavalry,such as dragoons or cuirassiers, which were armed with broadswords, were taught to use couched damage while charging enemy infantry. The first line of charging horsemen were trained to strerch their hands with weapons forward, aiming opposing infantrymen's chest. I'm not sure of the same practice during medieval cavalry charges, but I believe it would be the same.What I would really welcome in warband is an opportunity to perform couched attack with any weapon which can thrust and can be used on horseback.