The FAction trait that Yithril has, Great Axes gives access to two weapons, the trog axe and the Great Axe.  The Trog axe is better than what it replaces, adding 33% armor penetration, the Great axe is actually worse, it has the same damage 21 as the great sword it replaces and has backswing instead of counterattack, which is less useful.  I suggest changing the damage to 25 AND adding the 33% armor piercing that the Trog axe has, making this faction trait actual competition from the other weapon traits, like assassins, battle hammers, wonderlust, and archers.  Right now it is shit.