If we talk about morale and discipline, we have to realize that during the crusades there were at least 5 different types of warriors :

1.Tafurs
basically scrappickers who fought with clubs , scythes etc .. even cheaper than Ashis
2. Conscripts
Footsoldiers
3. Volunteers
The Military Orders.
4. Nobility
Knights (Cavallery)
5. Mercenaries

And I think there should also be people who just have to defend themselves, like townsfolk during a siege or pilgrims..

I think this basic structure should be reflected in morale, discipline and armament of the units in the game.


.. and this is only one (the frankish) side, the Muslims had their own unique way of fighting!!