Personally I loved Kalidan's mental health struggles in this book. As someone who struggles with depression, his experiences hit me hard. I think that for some people it might be overkill to have him so depressed, but it really makes me feel, and I appreciate that. The scene where he breaks down in his room gave me chills, because I've had the exact same thing happen to me. I love when Adolin and Syl come in to try to help, and eventually get him to go out. That's one of my favorite chapters, I love the friendship between those two. Admittedly, because of how I relate to it sometimes reading those parts can be hard, but I also love the depth of which he feels.
The scene where Hesina convinces Lirin to ask why Noril has painted the glyph on his head resonates with me so much too. Noril explains that Kal gives him hope, he feels that because Kal can get up every day and fight, so can he. That's really the main reason I love these. Because I see him push forward, with the help of friends, and come out stronger at the end. It is so so powerful for me, because I see his pain, but I feel hope that I can feel happy again too, and push through like Kal does.
The part with Tien made me cry, because it impacts Kal so much. Tien gives him hope and love, and Kal finally allows himself to feel that love. And the next part with Kaladin saving Syl was also so beautiful, that chapter is probably my favorite in the book.
Anyway, that was super long, but those are my feelings.