It's by no means that I don't know how to react to Hammer of Sol coming down. It's that the viable reactions are so limited that there's no real counterplay. Bladedancer was nerfed specifically for this reason way back before TDB released. Reactions 1) Run for dear life. 2) Outplay the sunbreaker massively (This includes sniping them TWICE, surviving long enough to tether them, dodging 6 hammers, or being able to focus fire a massively armored guardian before a single person dies to a hammer). 3) Be one of two subclasses, have super up, and use it before sunbreaker can throw two or three hammers (Striker/Voidwalker). Hunter has no guaranteed counter (Two GG shots or surviving long enough for tether are not counters, they're outplaying). None of those seem like good reactions, no? Whereas every other mobile super has a clear reaction. Stormtrance? Split up, focus fire, keep distance - admittedly, Stormtrance needs it's armor hit a bit as well. Arc Blade? Don't let them in melee range, shotgun/melee, snipe, really anything. Radiance? Dodge grenades (Much easier than hammers). Golden Gun? Corner camp, snipe, sticky grenade, heavy, etc. If you weren't here for Destiny's release, let me give you a little history: At the start of the game, Arc Blade had as much armor as Sunbreaker does. Combined with Hungering Blade, it made Arc Blade almost exactly like Hammer of Sol. Except it was melee. They nerfed Arc Blade's armor because it was so hard to deal with on the Destiny map pool. So based off of the past, a Hammer of Sol nerf is almost certainly coming. If it isn't, I'd be surprised. Sunbreaker does need a tiny bit of help outside of its Super to be equivalent to other subclasses outside of super, and Defender needs it's own special sort of love for PvP viability outside of control/salvage, but Hammer of Sol needs a nerf badly.