I really can't decide if these fellas deserve Unnatural Strength or not. My gut says no.

Beastman

Characteristics Modifers: +5 S, +5 T, -5 Int, -5 Fel
Aptitudes: Strength, Toughness, Perception, Weapon Skill, Offence, Fieldcraft
Starting Skills: Awareness, Intimidate, Survival
Starting Talents: Berserk Charge, Disturbing Voice, Frenzy, Weapon Training (Solid Projectile, Low-tech)
Starting Gear: Great Weapon or Mono-Sword or Mono-Warhammer

Special Rule: Beastmen take a -10 to all test to avoid Corruption.
 

The mono upgrades seem out of place for a group of soldiers that are supposed to be primitive.

Plushy said:

I think this sentence suffers a bit from bad wording.

If you fail a willpower test against a daemon you get corruption points equal to his fear level. Does this special rule mean that beastmen are more afraif of daemons than other (ab)humans? After all they would get -10 on the test.
I'm assuming the intention behind this is that beastmen get corrupted more easily. To achieve this without the afformentioned effect you could replace the special rule with something along these lines.

Special Rule: Whenever a Beastman gets corruption points from any source he immedeatly gains an additional 1d5 corruption point.