Been thinking about the horo, for awhile...
Can't you simply change it to have sashimono on the hatamoto, and the horo on the general?

i used to mod MTW2, and if memory serves me, A general's unit can have a "captain" model, and "generic" model

if you could apply a captain model to that, and make him wear the horo, because the horo was a sign of importance, but make the hatamoto wear sashimono... wouldnt that look better, and be more in keeping with tradition?

cuz yeah in MTW2 i used to have my generals horse barded, and the other knights non barded, etc.

while your at it, could probably make captains better fighters or something, as they tend to draw "captain" stats from another unit entry.