I'm not sure I like that, since that basically means that you would want to start every fight with the taunt if you just can. So basically whenever enemy doesn't have vision of you and is walking towards you, you get 1 free rank of style rating with it. And that 1 rank brings a faster ult, and can be extremely powerful swing in getting damage out fast.
It straight up DOES add power in that situation... Obviously not if the enemy can see her and react to it, then its dogshit. But in facecheck situations, if it can be smoothly used as a combo starter then there is no doubt at all that it indeed does add power. Goes against your idea of not adding power.