I will head up this post by saying that while I like Jasnah, she's a bit of a jerk.
First: Why I like Jasnah
Jasnah is a fun character. She's competent, overkill, and everything that you want in a Stormlight character. In Way of Kings, she's a one-dimensional, static, and very minor character. She feels sort of like a backdrop for Shallan. But she doesn't stay that way for long.
At the end of Way of Kings, she starts to become more relatable. She starts getting pretty fleshed out in books 3+. She's not unreasonably perfect: she grapples with insecurity, as shown in the prologue of Oathbringer. She's afraid of not being able to protect her family, as well as being behind on the curve. She's walled off because of this, and as of Rhythm of War, she's only just starting to truly open up. Her shell is slowly breaking open, and I can't wait for her to get the relevance she deserves
Second: Why I think that she's a jerk
I could make a lengthy argument here, but let's face it: we've all read Way of Kings. As she opens up, mainly to Shallan and Wit, she becomes less of a jerk, and she's becoming less of one the more we see her insecurities. All the same, here's a quote:
"How often has "hope" been the reason someone refuses to move on and accept a realistic attitude? How often has "hope" caused more pain or delayed healing? How often has "hope" prevented someone from standing up and doing what needs to be done, because they cling to a wish for everything to be different?”
-Jasnah Kholin, to Dalinar Kholin
So yes, I really like Jasnah. However, she definitely has a lot of character development in her future.
Thank you for reading this rant.