That is your opinion, and in MY opinion the plot would be even more ****ed up without him. He added a great deal odd realism imho, he displayed actual emotion that a person his age would naturally display if put in his shoes. He doesn't have a Jesus/Messiah complex like one character, he came from wanting to avenge his clan>wanting to avenge the brother who returned out to love him deeply, and to make those who caused his pain to suffer (I would personally want that should people ever make MY older brother go through that much pain)> seeking out the truth behind everything> wanting a revolution, after realizing how twisted the current system is> to finally cooperating with others to achieve peace, instead of planning on becoming like his brother, except on a grander scale