You can’t have an MMO expansion without class changes, and
Star Wars: The Old Republic’s Knights of the Fallen Empire update is no exception. The 4.0 patch will give Shadows and Assassins a new ability which will aid in stealthily approaching targets.
BioWare has also moved the Phase Walk ability into the Consular/Inquisitor base class, meaning that Shadows and Sages now have access to it and therefore have an additional option when it comes to escaping danger.
The rest of the class tweaks, which BioWare describes as subject to change, can be found in the Consular/Inquisitor dev blog.