Here I am, four years later, reading your review and completely agreeing with every point! Though you were quite generous with the 7 as I gave it a 6.5. Though I was weird for not seeing the chemistry between the main leads and in addition to Park Bo Geums great (but very fictional) character the queen left quite an impression as I loved her scene! She is a well played psychotic character.
A drama that is truly worth watching. The beginning might be a bit slow but the story develops like fine wine. It gets better the longer you watch. Ps. prepare some tissues as well
Weird detail, but I'm so happy that you mentioned the OSTs in Signal. It really lifted up and made the drama much better. It is also a great album to listen to on Spotify (10/10 I recommend)
Ps. prepare some tissues as well