Did it not occur to you that the grenades kills on sunsinger are higher because of their super? Sunsinger melee is strong as it grants a shield on hit. I figure people don't complain about it is as much because it's easier to shutdown a sunsinger with a shotgun than it is a titan turning the corner to shoulder charge. I try to leave bias aside as I enjoy playing all classes but yeah, hunter's are best suited to pvp.