Players have received a free expansion called Bound by Duty.
The main innovation is the Theatre of Rectitude arena, where you have to repel waves of enemies. Among the new enemies is the Scab Plasma Gunner, a new type of elite unit that poses a serious threat. New Havoc mutators and another weapon have also been added to the game.
The developers have also revised the class balance. The Zealot has undergone the most changes, but adjustments have also affected other specializations. The full list of changes is available in the official materials at the link.