Been a while since anyone has posted here.
What inspired this suggestion I'm about to make was actually this post.
The idea for this ability gave me Lotr Thrid Age game for PS2.
So my suggestion has involves upgrading Berserkers. The Uruk Captain upgrade portrait is a mask of a Berserker, so why not let the Berserker receive the upgrade. What would it do?
The Berserker would become level 5, turning into the
Berserker Veteran (That is the name of the Berserker with that specific helmet in The Third Age game). This would give the Berserker the benefits of being level 5, as an increase to Armor and Damage. It will also give the Berserker Veteran a new ability, inspired by the Berserker's abilities in The Third Age.
Stagger Foe: The Berserker Veteran does an attack on a Single Target, Disabling them from using abilities, switching formation, switching stances, etc. for 5 seconds. Affects the entire Battalion if used on 1 member of a battalion.
Anyways, I won't mind if this doesn't make it to the mod, but I find it really cool, and would also make it more useful to buy Berserkers, while not overpowered in my opinion because of the Cost of the Upgrade.