Whenever random korean/chinese/etc words pop up in the English fanfics i'm reading it just ruins the pacing of the story. It's just random and koreaboo-ish, I've read very few where it was used in a way that didn't come across cringey
People get really angry over omegaverse the biggest complaint I've seen is that its not possible in real life which is funny because like 95% of fanfiction wouldn't happen in real life lol. Personally, I love the idea of men going through pregnancy but that may be because I want men to suffer through the same things women do lmao