Agility, for the most part, doesn't do much at all. I've tested this for ~1 day. I haven't noticed any significant changes from the Warlock class. With a Warlock that has Arcane Wisdom and Chaos Order, which is just about all Battle Recovery and Speed (with the exclusion of Annihilate), you don't even get a full second of improvement to overall speed nor do you get more than 1/4 difference in jump height, if that. The most noticeable improvement is to jump height! I feel as if I'm running the same exact speed and I have timed the speed by running a constricted course wall to wall. I believe there should be a much noticeable difference in speed. If I have little over an empty bar of agility, I shouldn't be punished and move like I have weights on my feet, but I shouldn't be going anywhere near as fast as the same class fully spec'd out for agility. It's absolutely ridiculous.