Some assorted thoughts which I will try to keep spoiler-free? No guarantees about stuff in the comments though. I'm about halfway through and oh my god this series is so good.
-Jingrui is like, the obligatory precious cinnamon roll too good for this sinful world, too pure.
-I can't think of the last time I watched something live-action where men were allowed to show this dynamic range of feelings, both physically and verbally. And even in anime, dudes crying is usually only at the emotional climax of stuff, so it's really nice to have a range of sorrow and regret and longing and joy regularly shown from a variety of characters.
-Likewise, it's really great to have a huge variety of women of various roles and backgrounds and motivation who get plenty of screentime - there's definitely a sense that even if their positions are different than those of the men, they still have a great deal of power of various forms
-By which I mean I would let Nihaung use me as a doormat, what a fucking badass.
-Commander Meng does not have an ounce of guile in his body, and it's sort of adorable, particularly after he was introduced as such a serious badass.
-Basically every interaction between Lin Shu and his household is wonderful and precious. It's really clear how much they all care about him, even if they don't know how to keep him from literally working himself to death.
-EVERYTHING IS SO PRETTY. Comes with the 'historical drama' territory, I guess, but god, some of the hair ornaments are to die for.