Thorns DoT is what makes it so OP. I honestly don't think any other guns need a nerf. They excel in certain areas and sucks in others (TLW at range for instance). The issue is that Thorn does insane damage then keeps you vulnerable for several seconds extra (seconds might as well be years in PVP). I'm fine with it doing insane damage or having a dot. But it can't have both or it becomes insanely overpowered. Cut the damage output and half and it becomes a reasonable option rather then the end all be all of PVP.