This is why it is very difficult to balance the rogue. They specialize in Burst. If you don't have a certain amount of effective HP, you will die in a second or 2. Past that critical point, the current popular rogue builds fall off since they cannot sustain their damage output and have low survivability. Why do most people build glasscannon? "Natural progression", the rogue talents, skills and stat bonus push towards being killers not tankers. Looking at End game PVE builds, most rogues rely on Stealth for survival.
Instantly killing enemies is fun but the receiving end is not. We will try to find a balance to it.