But yes, for raw damage, dex chars are weaker - so it's good they get more board control to compensate.
Yyyyyy, actually in terms of raw damage, rogue is most powerful class in the game. Backstabbing ftw
Again though, if you had a 2H Glass Cannon Warrior with 5 points in sneak wouldn't it be able to do just the same as your rogue just quicker, better and with less risk?
You can use backstabbing only with daggers. And daggers are dex-based, one-handed weapons.