I think the hearts would be a great addition. It would certainly benefit those with low AP thus making them harder to die which is what I thought they wanted in the first place? For a saint this would be more of a useless update since they're already invulnerable and would have no need for more hearts. With more hearts, there would be less need to heal since you already have more hearts. The main purpose for a quest is for fun. The reward of this quest is a heart. Use that heart to help you PK and have more fun, or if you're a saint just keep doing what you're doing. Chill and have fun as you were before. No reason to not to now.