It appears that since the patch the trait Ankle Shots now appears to reduce the damage on the main-hand auto-attack by around 25-26% upon taking it.
Whilst having NO traits equipped the auto-attack (for me) does 495 but upon equipping the trait Vital Shot then flips over and the new skill now only deals 393 damage per hit, a LOSS of over 100 damage from a trait that’s suppose to increase it.