Counterstance: Increases chance to counter but lowers defense
So getting owned by Roc is because you took the hate and
Wiki said:
While this ability is active, the user's defense rating is calculated only using the character's VIT and any bonuses from Minne. Defense bonuses and penalties from any other source (Armor, Job Traits, Protect) will be ignored (however, "Defense down" effects from enemies will still apply).
So I don't think there's anything wrong with counterstance in my opinion. Guess I'll have to try it out too to be sure.
SE will prob do another maintenance again just to fix the stuff.