I'm expecting a 50% reduction or something close to that. If it wasn't so bad they'd have told us in the patchnotes. Maybe they should've given other weapons a buff to make them more desirable? There should always be a few weapons, Vex/Gjallarhorn/Icebreaker, that people strive for because they're so good. Maybe this nerf won't be so bad, maybe it will. We'll find out soon.