I dont think they are making a class that can stealth so much cause they want to take advantage of their combat system. If you got a class who can stealth around all the time it kinda breaks that system. Its better if you stealth just to attack and you wont be able to stealth away from someone, thats what ruins world pvp in wow when it comes to rogues. Just pop cloak of shadow and vanish and he will never find you. Kinda broken if you ask me. Also stalker is probably as they said more assasin like then stealthy. Very flexible and quick and jumps around freely slicing everything in their path, jumping over the opponent etc etc. I believe that is way more interesting way to play then just stealthing around. Also i believe stalkers wont be as weak to physical blows as rogues was in wow.