The Hero Abilities are great~

[Runner]

the hero abilities of the heros in the Crusades Campaign are great!!
HEART OF THE LION, THE FLOWER OF CHIVALRY, BYZANTINE POLITICS, etc

are there any mod which have immersed these kinds of hero abilities in the medieval campaign map?

it will be so great if each faction can have some heroes with their own hero abilities

the concept of "Hero Ability" is very suitable for the mod such like Third Age~

[Hazzard]

Some of the generals in Third Age do get hero abilities, I'm not sure why some of the more fun-based and less historical accuracy based mods don't try it.

[Dude with the Food]

TATW definitely does. Some of them are very powerful like (IIRC) all the Nazgul get ones that drop enemy morale massively. Great using that right before a joint Nazgul/troll charge.