I think the stuns have got out of hand in PVP, when you can be stun-locked to death its just too much. The immunity to stuns after 2 doesn't work well enough to do any good, as it doesn't last any decent amount of time. Just make the stuns work as a slow downs or some other form of debuff, is how I would suggest they work, but stunned completely needs to go away in PVP.