Sun breakers KD was higher by a marginal amount. They admitted such. It was 0.1 higher than the combined total of Warlock and Hunter each separately as a whole. Meaning, yes, Sunbreaker did have a K/D slightly higher than Sunsinger, Void Walker, Storm caller combined but if we are going to use the combined KDs of three sunglasses to justify the Nerf, then what about the combined KDs of all Titan classes? The combined KDs of all Titan classes puts the Titan well under the rest. When it requires a subclass to be OP to even match the KD average of the other two archetypes, that is less of a problem with that subclass itself and more of an issue with Titan overall. This little update they did likely won't even push Striker or Defender over 1.0 overall KD