I'm happy Chiyo lost her powers. Her precognition often impeded the progression of their relationship (typically as a consequence of Chiyo's embarrassment).
I also enjoyed the exploration of Chiyo's insecurities in the last few chapters. Her abilities served as a way to secure validation and reaffirm her boyfriend's love for her. Losing that power placed her in the same position as everyone else. This required her to learn how to believe in Kishida and his love for her.