I don’t remember it being mentioned in any update, but today I noticed that the Lash skill costs 5 extra fatigue and can no longer hit any one of three tiles (thus presumably not an area-of-effect attack any more and not enhanceable by Bloody Harvest), but does now ignore the defence bonus of shields (like the standard skill) and has a 100% chance to hit the head if it’s not avoided!
That makes the Head-Hunter perk even less enticing!