Peacekeeper
Zone attack Cancels recovery time increased by 200ms
Developer Comments: The Peacekeeper Zone attack is one of the fastest attack in the game and the second part could be cancelled instantaneously. It was creating infinite combo with revenge. The decision to add a recovery time is to make the move fairer and prevent the revenge abuse.
[Bug Fix] Counter Guardbreaking a Peacekeeper Guardbreak was not applying the same Damage Reduction modifier as all other heroes which led to possible abuse in group fights.
Straight from the patch notes regarding PK, from November 30th. This is the only fixes done to her, so not sure what you mean? Maybe put more stats into debuff resistance.