One positive aspect is that pain is eliminated. For example, only women on the savage reservation give birth to children themselves. Civilized babies are test tube babies, therefore no mothers ever feel the pain of birth.
What is intriguing, especially to young people, about this novel is the idea that nobody is left out. Everybody belongs to everybody...everybody has a role to play and everybody is conditioned to like the role they have been predestined to fill. In a world of increased bullying, isolation, and teen suicide due to people feeling like they don't belong and aren't worthy because they are not exactly like the "populars", this part of the Brave New World might have some merit.
The main goal of a utopia is to eliminate anything that stands in the way of people's unhappiness. However, in order to be truly, humanly happy, people must have experienced struggles and sorrow. John the Savage realizes this human truth as he tells Mustapha [whose name means confused] Mond [monde means world in French]:
"But I don't want comfort. I want God, I want poetry, I want real danger, I want freedom, I want goodness. I want sin"
"In fact," said Mustapha Mond, "you're claiming the right to be unhappy."
"All right then," said the Savage defiantly, "I claming the right to be unhappy."
John the Savage claims the right to be human; the residents of the New World are not fully human. But, they are safe from discomfort, save from disease, safe from anxiety, save from everything but death.
The message of Huxley's novel is profoundly relevant to present times. More and more there are people in modern society who have expressed their desire to just be "safe" and have the government take care of them. Is this not interesting and thought-provoking?
Think of all the ways that your life can be dissatisfying, difficult, and uncertain. Think about how much easier things would be if those problems would go away. Imagine never having to worry about whether you would find someone to love you. Imagine never having to worry about whether you would find a job that would fit your talents. This is what is so appealing about the society in this book. It seems like a perfect society in which people's worries have been engineered away. Of course, it is not very human, but there is something attractive about the idea of having certainty and security, isn't there?
The chapter that you need to look at in this excellent and classic dystopian novel is Chapter 17, when Mustapha Mond finally meets and dialogues with John, and he justifies the world that has been created. Certainly, in spite of the lack of individuality and the way that everybody is conditioned and programmed, there are a number of positives in this world. The biggest positive, to my mind at least, comes when Mustapha Mond tells us about one of the changes that they made:
"...there aren't any flies or mosquitoes to sting you. We got ride of them all centuries ago."
A world without mosquitoes is a world that is well-worth living in, if you ask me! But seriously, in addition, the programmed nature of this world means that all war and personal discord has been eradicated, creating a very safe and stable environment. This is why, according to Mustapha Mond, there is no need for heroism or nobility in this world, as the peace and total harmony, with everybody conditioned to accept their roles, gives no opportunity for anybody to be heroic or noble. Of course, the biggest limitation is that you reduce humanity to being like preconditioned robots.