I disagree. The rogue in WoW is a glass cannon; they rely on stunlocks and burst damage for survival and that's the entire point of the class - high risk and high reward. If you break the stunlock (which is not hard to do with PvP builds and equipment), unless they have vanish or sprint on handy, they are stuffed. And that's okay.
Remember, a rogue out of stealth is just as afraid of you as you are of it. If they screw up, they die. It's pretty rare that a (at least semi-skilled) player doesn't get the HK on a rogue that's out in the open and doesn't have you locked down. It's also not easy to actually lock the enemy down 100% of the time. It takes a specific build. That means the rogue is 100% banking on their lockdown working. If it fails, they die. It's a class of skill and reflexes, not unlike certain mages.
If you don't want stunlocking, then I don't want the ability to slow melee classes in a game. If you play your cards right, a slowed melee toon is as good as dead.
I don't play WoW anymore, by the way. When I did, I was a lock.