in warband,
cav acts independetly, skirmishing around and taking oportunities when noone is watching to move in for a kill, instead of forming mass body and charging
archers snipe independently, instead of forming mass volleys like they would do in medieval times
and im hoping that will change in mount and blade 2 , cause i doubt anyone can do anything about it in warband, it can only be changed by peoples will to roleplay, and thats somethign you cant force