'Too many layers' is a trend and I believe that it can be pulled off well if layered well. As for the other clothes, most of them were/are in fashion when the movies/dramas were released. There are some dramas though where they purposely make the girl seem like she has no fashion sense. I do agree with the 2nd the point though, some of that was absolutely ridiculous!
I know right? I sort of feel really bad for Shin Se Kyung, this is the 2nd time I've seen her get a role that hasn't been developed propely. I think she's a great actress though as she potrays whatever she's been given propely, hope she doesn't get hate for this.