The latest Darkfall Online: Unholy Wars developer blog has been posted on the official site. In it, the team speaks to changes to the Slayer class in the next patch. Specifically, the team is making adjustments to the Barrage skill in addition to other changes in the game.
We also made changes to ithe Slayer Barrage skill, as we felt that Slayer lacked some unique mechanic, a kind of spice in the gameplay to feel more satisfying. Additionally, Slayer was having some minor problems by the multiple knockbacks that other roles / schools have available. After some thought on the matter, we decided to add the unique and new mechanic of knockback invulnerability on the first few seconds of the ultimate Barrage skill so that the Slayer could land more that two melee hits more consistently, especially against Air Elementalists and Baresark / Battle Brand Warriors.
Read more on the Darkfall: Unholy Wars site.