There arent any usage statistics to provide evidence that the class is op. Example: suros got a nerf because its usage was extremely high. If there was high amounts of teams comprised of only sunbreakers the class would probably get a nerf. Just because you're upset because you were killed by the class, doesn't provide enough of a reason to nerf it. Like many complaints the nerf sunbreaker class comes from an extreme vocal minority. Bungie makes rebalance decisions based upon statistical usage, not because of a small percentage of people raging about getting killed by something.