Like we showed at PAX East and like Swen was saying on the PC gamer talk this week, physical armor and magic armor are a really important factor to every combat.

Magic Armor block everything like charm/stunned/chilled, etc.
Physical Armor block everything like tripping/bleeding and such.

So before shooting that stunning arrow you need to ask yourself, will I make enough damage to go through the armor and then stun in that same shot or should I just make a normal attack and use it next turn.

CC is still really powerful but it's not the go to skill to use on first turn to win every single fight. In fact, you should probably wait until armor is broken.