@Thomas,
To start where you started, your claim about sex is just silly. In most of western culture (all of it as far as i know, but i admit that i cannot claim to know exhaustively), incest is taboo, even if not banned outright by law. Egyptian civilizatiton, which arose more than 6000 years ago, and became the hiearchical society which one might recognize from western civilization's image of Egyptian society 5000 years ago--not only casually practiced incest, but encouraged it in their ruling dynasties. They had a good run for about 3000 years, far longer than any similar institution in the West, so i can't see any reason to suggest that incest, even at the highest levels of society, harmed them. Yet contemporary western cultures universally or almost universally condemn incest.
Female genital mutilation, circumscision, prostitution being generally illegal in our culture--there are a quite a few ethical issues related to sex.
Your dietary strictures are absurd. You assume animal suffering without substantiating it. If eating fruit does not make a plant suffer, why would eating eggs or dairy products make chickens or cattle suffer? Why would an ethical person need to be a "strict vegan?"
In
Brave New World, the dead were cremated in order to harvest soft metals such as phosphorus, sulphur, potassium, etc. Nothing is ever as simple as it seems.
Otherwise, i don't see too much objection to your program.