Because all the new and presumably bad players are going over to it because it has the most killing potential for a super. Just because people who play sunbreaker are bad without the super doesn't mean that with the super active, they won't do well. I, for example, have never been killed while in my super while playing sunbreaker. The high damage output, coupled with high damage resistance, coupled with health regeneration, solidifies that I just won't die while supering. The super completely topples over all the other supers in a way that not only portrays it as an over powered subclass but turns it into a nearly unstoppable class. So.... What's your point?