Parry should be good enough that its required at high levels of play but novel at lower levels due to the punishing nature of missing it. right now the stun is just way too little as it doesn't even let you get anything from it and is still a lose/lose when a DPS or Healer parry a tank they just continue on with whaling on you cause they have gap closers.
There need to be ways to guarantee a combo and a parry is a good way imo. I can count on one hand the amount of times i've been able to hit his charged 3 hit combo into bodyslam because there is no hitstun and people just run out of it or dash.
I'd suggest a parry against a tank giving you a short amount of time where your attacks apply hitstun so you can actually damage them without them going crazy on you at the same time.