Given the choice between a weapon in i150 Feast where you have +50 crit/det and a weapon with +50 crit/det/skill speed/accuracy/+20 parry which one is better? The extra accuracy alone allows you to run 2 less Accuracy accessories effectively giving you an extra +50 crit (or det). The +50 skill speed is cool, not huge, but certainly helps with slightly faster GCDs and better DoT ticks. While Parry is more or less a "bad" stat, if you're going to optimize for i150 PvP and you've already capped the other skills, you may as well put whats left in there. Parries have made the difference in games, just this weekend I won because I lived with 2 HP in the last 30 seconds of the game. Popping Keen Flurry (and hence parrying) very well might've been the deciding factor in said game.
