It would be infinitely unfair to expect Rock to remain all clean and innocent while living in such a city for an extended period of time. However, maybe Rock's general goodwill be sufficient for Revy, even if his methods may be getting darker. At least I think Rock is still seeking outcomes that "will make the world a better place". In fact I think it should be sufficient. People like Revy hardly consider even brutal methods out of the ordinary, but using them not to make money or seek power but to save someone "irrelevant" or make the city safer should be an ample distinction.