Now that I've watched the ending, everyone seemed to be on their proper places now. Did the characters got the liberation that they wanted? I'd say YES. But does it stopped from there? NO. I think that's what the open ending told us too. Liberation is a process that you'll live with throughout your life.
As someone that could fully relate to Mi Jeong's character, I am truly satisfied with how her character developed. She obviously outgrown her character from the early episodes. Remember how she was like a lost soul loitering around, without a clue on why she's feeling awfully exhausted all the time? Throughout her liberation process, at the finale episode, she finally was able to distinguish the problem.