I think you could say "섬세하다". These words are used more frequently when we describe actor's acting. ex. 그 영화배우의 섬세한 감정 표현이 돋보였어. cf. "미묘하다" is verb form. but we usually use it adjective form like "미묘한" especially when we describe a little bit different thing from other thing. ex. 두 사람은 쌍둥이지만 미묘한 차이가 있다. p.s. I just wrote this based on my thought. So you should see other people's reply as well. haha. :)