Whilst the premise of the drama is not new, I think it's fairly well-executed. I think Zhang Ling He and Zhao Jin Mai had good chemistry in the drama, and I found the quipping between their characters entertaining. However, I do think there could have been less arguing about the same issues later on. I also enjoyed watching Li Rong and Li Chuan's relationship - lots of poignant scenes. I think the pacing for the drama is pretty good, for most of it, with little wasted time. I flew through most of the drama. I think the ending could have been a little longer.
The reason why I've given a low rewatch value but high scoring for the drama overall is that it just isn't the sort of drama that I want to rewatch, since the unknown outcomes of all the plotting is what makes it exciting.
I've written a more detailed review of this drama with spoilers on my blog:
https://onthisiponder.wordpress.com/2024/09/09/chinese-drama-the-princess-royal-《度华年》review/