It was probably down for a site update. They replaced Ronan's DK image in the top left with Lass' picture now. I imagine they took the time also to do any other modifications they needed.
Yep. Lass is added to the guide, and his official class name is THIEF, not Ninja. Thank god.
Originally Posted by Official Site
(Grade 1) Thief’s 1st grade attack enables the user to concentrate his energy, and shoot a powerful shockwave at a target. Since Lass does not possess many finishing skills, this skill is effective to finish targets in critical condition after their HP is whittled down with normal attacks. Impact Slash has a short activation time and high accuracy, but it’s not effective at countering the critical skills of enemies.
(Grade 2) Thief’s 2nd grade attack enables the user to critically wound enemies at a 50% success rate by aiming at their vital points. Fatal Fury will put enemies in critical condition, regardless of their level and remaining HP, in a brilliant flash of light if it is successful. This skill leaves the opponent in fatal condition regardless of her remaining strength, so it’s best to use it on an opponent
that has a lot of strength remaining. When this skill is used on an enemy preparing for a level attack, this skill’s attack will be considered a counter, and immediately finish the enemy.
(Grade 3) Thief’s 3rd grade level attack enables the user to shoot multiple sword spheres in the air after performing a high, backwards jump. This skill has extremely high attack strength, but may miss if the user fails to aim the skill correctly. Final Strike cannot inflict much damage to targets with enough MP since it activates a counter. Players will need to practice this skill in order to really use it effectively.