Edit: opps, you didn't miss any out...

Thus you could pin a unit of Feudal Sergeants wait unit they lost 10% and hit them in the reare with a cavalry charge and they would break every time...

Valour and the generals rank added to morale too...

I'll see if I can find it tonight, but I do think it has been revised in RTW because I find it much harded to get routed units back into the fight than in MTW...