Having recently read through the Golden Hoard thread I noticed that the old arguments for and against Halberdiers had come up. Personally I lover those guys. I completely replace spears with them. Yes they have low moral. You just have to make sure you build them only where you have some moral boosting buildings. A church and requiem at minimum. I believe that gives +3 to moral. Next only let them attack Calvary and other Armored units, but only when those are close to your lines. Never let armor piercing units near them. Also don't let them receive a Cav charge while just standing there. Have them charge the incoming Cav. Pavise arbalesters set on hold formation, hold position do a good job taking charges and hold long enough for the Halberdiers to engage the Cav.