I use thorn basically during Iron Banner weeks, and favor other guns most of the time. Thorn is a great gun, but not even close to overpowered, and it's the rare thorn user that can consistently land the 2 hit kill. I get taken down by red death more quickly, and much more regularly. I even have more kills with my Hard Light than my Thorn. Let that sink in before you go calling for a nerf.