Brian Holinka, who is quickly becoming the most frequent tweeter on the dev team, recently talked about Shadowstep and rogue mobility in a series of tweets. Mobility is one of those things that gets trotted out every time a melee class starts talking about PvP balance. One melee class has a teleport, another has a snare break, yet another has a speed boost –- no two melee classes are equal. I'm sure we all remember ret paladins complaining about their lack of a "gap closer." The problem with mobility is that mobility doesn't matter. Well, not really.
What really matters to a melee class is uptime. Our goal isn't to have 100% mobility, it's to have 100% uptime. We want to be attacking our target as often as possible, and that usually requires being in melee range. Looking at mobility in a vacuum is missing the forest for the trees. Mobility is just one of the tools that we use to achieve a high melee uptime. All of our other abilities, like CCs, stuns, and slows are critical components to maximizing our uptime. Shuriken Toss is the exact opposite of mobility, but its strength comes from increasing our uptime despite being out of melee range.