I agree. But at the same time, I disagree. If they add healing abilities to a warlock subclass, then they would have to add it to all subclasses to make the gameplay fair. And the warlock subclass, sunsinger, already has a healing ability. When I use radiance, it heals all my teammates that are near me. And being a master warlock, I am able to resurrect myself using radiance. So if bungie were to add more healing abilities, it would be completely unfair and op. Although they could maybe add a new subclass based on healing abilities. But I'm not sure if that would work well.