Was super into a couple of characters/relationships for some of these episodes... but for all the wrong reasons, and in all the wrong ways, and for a story that is NOT this one... woops. (Oh and all the wrong ships too...)
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My interest in this show has suddenly become:
1. Dal hanging upside down in a hot herb lady's storeroom making snarky remarks.
2. Every time Lee Ji Hoon is on screen but like without the surrounding canon plot. (a)
3. LJH and the hot herb lady flirting.
4. Uhm yeah… I think that’s about it.

Me watching this is just me sitting there wishing it was about assassins and herbalists and attractive soldiers and NOT about palace politics with the Right/Left Minister substituted for some tribe leader and a lost princess who went through two entire dramas worth of backstory and emotional development in 4 episodes.

The show did better at establishing setting than last week but still retains almost all of the same issues as the premiere nonetheless.

FOOTNOTES:
(a). Remember when you said the plot could be done well Sic? Remember that? Look what I meant was, ASSASSINS with secret PASTS can be done well… not Every Sageuk Political Drama To Ever Exist (although in all fairness that ALSO can be done well… but I think all of us are over it no?)

This drama could be so much better without the comedy bits. It comes out of nowhere and it is not ha ha ha funny, it is ha ha ha weird. After watching Mr Queen where comedy bits where insert in such an amazing way, with this drama, just seems off the beat.

I really like Lee Ji-Hoon like always!

For the rest, I don't know. I don't dislike it but I think it could be better. What was the point to use KSH as the Queen if nobody made the connection with the daughter later? Goguryeo was big but it looks pretty small in this version. Why didn't they kill the King sooner? 3 tribes are with the villain, one is down, one we don't know I think, so they could take the power sooner.

To be honest, I did not enjoy episode 3. I mean I was curious and all, but I don't think I might continue with it. Good luck though.

This show has potential and would like to see how it proceeds now that Ga Jin knows her real identity. For now she is tormented but her journey into accepting her princess identity and taking her place at the table can be epic.
I overestimated On Dal. I hoped he at least suspected who Ga Jin is after meeting her and the Queen all those years ago. I just hope On Dal has more going for himself and not just Ga Jin's support. I really like his dynamics with Mo Yong and hopefully the show will touch more on that in future episodes.
I like Mo Yong as character. She has an advantageous position to change tides for either side.
Now I am most interested about Go Geun. I like that he is loyal to Princess PG and would like to see him out maneuver his overambitious father.

✨I AM IN LOVE WITH THIS SHOW✨

This show is weird in the sense that I absolutely love the cast and the story but am unable to connect with it emotionally. Also Mo Young and Go Gun have some really great chemistry going on and I adore Lee Ji Hoon. I am curious to see the direction this drama is going to take now.

I have to say I liked less this week's episodes than the premiere, specially episode 3, but even so, I'm still here, mainly because of Lee JiHoon. I concur with you that he's always finds the perfect way to fit into his roles (even with the terrible ex in Dinner Mate, his job was outstanding, any other actor couldn't have made him as human as he did). I just hope that fateful promise to always serve the King will stay with him and that he doesn't turn into an evil character. This is the only thing I ask you, show. Keep my Go Gun an honest and honorable man.

I liked that we didn't go round and round about Gajin trying to uncover her past and so action is moving fast.

Regarding WonPyo and his evil intentions of killing the King... am I the only one thinking the son of Queen Yin Bi is not the King's but WonPyo? I mean, they are obviously lovers... could it be?

I like it, I am thoroughly enjoying the ride. KSH has such great chemistry with her co-stars.

The show is quite fast paced and it does not drag important reveals.
I like princess and On Dal but only because they are being portrayed by Kim So-Hyun and Ji Soo.
Their characters are pretty straight forward so far.
I like Mo Yong and Go Geon more as characters. They are grey and their intentions are ambiguous. Lee Ji Hoon and Choi Yoo-hwa are playing these characters to the perfection.
I especially loved interactions between Mo Yong and rest of the main characters. I am shipping Princess and Mo Yong together. One’s bravery, courage and another’s brain will take down all the entire kingdom.

Any reason why OnDal was preventing the reveal of GaJin as process to the ghost valley/sunno tribe? For goodness sakes she could have made some allies there with her identity; well unless if he wants to fulfil his fathers last wish and let the entire tribe live in seclusion, that's the only way I'd accept that.

Apart from this, this weeks plot was wow! More intersting was the fact that our heros are filled in just as the villains are. It would have been a bit too frequent a cliché if she knew her identity mid series or in further episodes, just good that they've gotten over that and the plot is on the move now, and peew,the plot moves really fast.

This story line really insults my memory of Jumong. Gyeru was the protagonist tribe in the five nations, but now its villainous - maybe a change in history.

I think that somehow cheesy fool smitten look should become a Jinsoo trademark...The plot moves sooo fast!Lee Ji hoon really is charismatic here! I doubt Hae Mo-Yong would truly be a a good character as i see her way too ambitious and will try to use Ga Jin as leverage as much as she'll can and would turn bloody on her just as fast,even more if she starts to fancy Go Geon.I'm also curious about Go Geon character,if he will truly be an ally to Ga Jin all the way or he'll also become spiriling and become a tragic one by it's end.Also love those small cracks into Dal's mask as the fool even when there are times that makes one wonder if somehow some of tose foolish traits sticked to him from playing one too long...Curious if they will keep with history about the Prince becoming the future Ruler(they did mention it so i guess they might)...I actually feel sad for Ga Jin/Princess as she carries so much guilt from her two lives now...Somehow i'm still a bit amazed she doesn't despise her father to her bones considering what he did but i guess she does need him is she returns...

I honestly liked these episodes. Better than the first. Let’s discuss bleeding heart of Go Geon, shall we? He’s had a crush on the princess since forever, when she was training her. Badass Princess turned ruthless assassin back to princess has to be pretty intriguing for him. He’s dying at some point, for sure. And I agree with @kiera about how this is shot. It’s dingy and dark and I want it light and airy—with more manes of glory, blowing in the wind. Oh, I just want to mention that @saya noticed a strange kwinkidink from The King and this show. The set has been recycled. It looks so different with different framing and design. https://dramasoverflowers.net/2021/02/26/a-drama-for-every-day-of-the-week-and-wandering-reviews-of-all-of-em/comment-page-1/#comment-1717

I need to wax poetic about Choi Yoo-hwa because she is simply awesome. I was so excited to know that she'll join this drama as one of the leads because despite her meager appearance in Life, she managed to leave quite a big impression.

Hae Mo-yong is a captivating character: intriguing, bold, sly, and more dangerous than she let on or what others perceived. And it's exciting to see Choi owning her so completely and effortlessly. I'm especially curious to see more dynamic between Geon and Mo-yong since he seemed to be the only one (so far) who realized just what a wild card this woman could be. She could be a worthy ally if one knows how to play the balance of power between them. So let's see what the writer has in mind for her.