There was an amusing point made about artificial selection. Would a commitee of Chimpanzees or Gorillas, when comptemplating potential evolutionary paths for their species, choose something like a human? Would they select for the loss of strength, loss of hair and smaller teeth?
Recently there was a discussion of what the improvements could be made in humans. Mostly, the decisions were based on what wore out quickest on humans, such as the hips, back, knees, hearts and eyes as well as some other features. Accordingly, their design was for improvements in these areas. A picture of this supposed improved person looked a bit odd with larger heavier hips and legs than are common now.
In many cases, this book talks about possible genetics based improvements for humans. We will find the genetic potentials for improvements in the heart, eyes, joints, hearing and such, but when it comes to modifications in structure, I would be careful and keep certain things in mind. Evolutionarily, humans are designed not only for bipedalism, but also for running. Since that is what we are primarily designed for, I would suggest that we work to retain and enhance that ability. We should work to enhance what abilities we already have and are designed for. Besides running, we have a special talent for climbing and exceptional vision. Selecting for modifications that change our basic strategies are to be considered most carefully and hesitantly.