No, it's doesn't one-shot all the crappy zeds. It's a two shot now unless you clear heads every single shot.
I want it to one shot all the crappy zeds. (clot, crawler, stalker). I want it to one-headshot slightly less crappy ones (gorefast, bloat). I want it to be *unable* to drop a scrake at the edge of rage threshhold in one clip.