This isn't a question of the HoS only. You need to look into the subclass as well as the class itself. For example an I'll use the striker. It's super in pvp usually yields around 2 kills and that's being generous. However to compensate for this strikers have lightning grenade, (which is arguably the best grenade in the game) shoulder charge, and transfusion. All of these skills combined makes up for the lack of a good super. The same can be said for other classes such as bladedancers with blink and quickdraw or sunsingers with firebolt grenades and flame shield. Now we can take a look at sunbreakers. We have cauterize (which is mainly used for HoS but we'll include it in the list anyway) which only consistently helps when using fusion grenades and ever then it is situational, and maybe fleetfire you could count however there are upgrades on armor that do a better job such as getting a double kill with a solar weapon increases agility. Besides these two perks which aren't very viable in the crucible all of our skills revolve around HoS. Therefore sunbreakers have to have a good super because of our lack of a solid pvp loadout. I agree that the damage resistance should be reduced to that of bladedancer but other than that i see no problems because it acts as a counterbalance to the rest of the subclass. Also if you would like to go deeper into this titans have a terrible melee range in comparison to other classes which sets us back farther than say a hunter or warlock. If anyone would like to discuss this with me in a respectable manner i would love to hear other people's thoughts after reading this (: