Remember in this world what is pretty is ugly. So the artist is saying in this world those girls have very ugly faces but they have very good bodies.....for that world standard, no for us. Pretty sure the uglyness it's the artist intention.
Wowza, they look horrendous but I'll let the author cook if it's his first manga but wow fo they ever look weird but I'm only here to pop one out not judge
I don't really have an issue with the size of the nipples so much as the structure. Nipples don't work that way. They have a bunch of small holes in them that, when lactation has been induced, allow milk to escape. It's not just one massive hole, so the structure here makes no sense (not unless some kind of body modification shite happened).