havent messed around with sunbreaker much since patch as i have been using striker (so much fun lol). But from what ive read is that when they nerfed the explosion radius, they did not mess with the prox detenation of the hammers, causing them to explode at the edge of their radius dealing minimum damage (which i can see bungie missing). If this is the actual issue, i agree that it needs to be fixed (along with arcblade and shoulder charge hit issues)