I've been trying to figure out why their faces in profile sometimes seem a bit weird in this comic, kind of like ancient Greek drawings. And I've finally realized; it's their eyelashes. They're often drawn facing towards the back of the head instead of extending forward. It resembles the way eyelashes look from a front rather than a profile view.
That being said, I love this development. And I also absolutely adore when artists completely omit the mouth line, the way Shen looks in the third panel here. It's so cute.