This review comes with spoilers - the spoilers are in the second half of this post and I shall mark it in bold letters so you can stop reading at that point if you don't want to be spoiled.

Referring to just part 2, this was literally actually theoretically a not so enjoyable rollercoaster ride. But theory cannot compete with Nam Goong Min and Ahn Eun Jin's acting so it was still very much enjoyable. Perfect man and perfect woman who are perfectly interesting both by themselves and together do not need the best chemistry to make their collaboration a success. That is my conclusion after seeing Jang Hyun and Gil Chae portrayals. They are gems ❤️ who will last a long time.

Pros:
CANNOT emphasize on the whole amazingness of this production enough. It surpassed everything in this show and even many other shows. They've left every other part of this show to play catch up to them, and when it almost seemed like some parts did, it left everything and everyone (except one aspect) in the dust and won the race. That one aspect, the only thing that was at least able to keep relative pace with (behind) the production was NGM & AEJ's acting. It was golden. These people can act. Coupled with those melting OSTs, this duo is pretty much unstoppable.
Coming to another important thing, the story. Despite the tumbles the writing took, the story and context (special praise and mention here - to how well they showed the difficulties of the commoners during a trying period) and plot - felt new, interesting, engaging and thought-provoking and in many places, the characters themselves were swoon-worthy. Forgetting all the flaws for a second, I think this deserves much appreciation.
However the side characters ended up, I cannot deny how I loved so many of them. I enjoyed Gu Jam, Jong Jong, Young Rang, Crown Prince & Princess and even the stupid Yong Gol Dae.
Best was the main couple of course. The characters held so much power and stood on their own so well and together, the pleasure they could give us was always double. So ya, all of that makes this drama a really good watch.

SPOILERS:::::

Cons:
Man, for an ending episode, that I was satisfied with in many ways, especially after the let down of the previous eps, it still left many things to be desired :( I was right, that they did seem to have had some of the ending planned before so it was not a complete mess, but it was still messy. Especially when it comes to Ryang Eum & Eun Ae. Ryang Eum - mainly cause of the ending - totally left him and us hanging there after all the build up in the first scene with the letter and finding the truth and if JH is coming back and all that stuff. Eun Ae - her role in part 1 was genuinely good. I cannot describe it properly but that's clearly how it was and how it felt. And in part 2, it all felt just lacking when it came to her - SO - the downward transition of this role and the character's importance feels like poor planning. As for Yeon Jun, it's a bit confusing - BUT - to me, the show has taken a confusing stand point forever when it comes to Yeon Jun. From part 1 till now, it's like they are unable to make up their minds which part of his personality they want to emphasize on and they're presenting all they can think of for him as it is. To me, that at least seems consistent even though it's a bit frustrating because if I want to call him names, I don't want to have doubts about it. I don't know if that was intended, but I doubt it. Possibly many other ifs and buts and uncrossed t's and undotted i's.

Overall, decided to stay consistent to my part 1 rating of 9 / 10.