*sigh*
The fear of death is THE main contributor of a warrior improving his skill.
"Getting stronger and better so that I won't die." "Getting stronger and better so that I can protect others." "Getting stronger and better so that I can be the best, which I can't do if the dead."
The moment you take that fear away, they are basically unskilled berserkers. Dangerous sure, but can be dealt with if their opponent is skilled. Throw in the fact that she takes their pain AND effect of the blow for them and.....well this chapter happens. It's majorly flawed.
Now give that ability to a warrior who already skilled and you have a amazing force on your side....but a small group of unskilled brawlers? A waste really...