The good thing about sunsingers was firebolt grenades combined with burning. Now that they have been heavily nerfed and flame shield was also further nerfed, there's no reason to choose a sunsinger over any other subclass (except maybe trials for self revive). However, having a worse neutral game than all the other subclasses does not justify this. Even then, self rez its not useful very often because people usually control orbs with shotguns or sniper rifles. As a warlock, i will now pick voidwalker or stormcaller for every mode. The best pvp class is now striker titan though.