for captain,
they easily get killed from enemy horsemen and infantry and archers when "f1 f3"
so i always tell them to follow me,,
getting great spots for skirmishes and always run from any dangers
Even then !!
when they get their jobs ok sometimes, the effect is not that impressive
even if they got a perfect match
the conclusion:
the hard work doesn't get payed well with them
for that, increases size by 1 or 2 might get them very balanced imo
and if possible, improving their "reaction speed" to a command and maneuver might help a lot
"giving them the double W W sprint to make the maneuvers works faster"