Y3 PREDICTION (Suzune)
Judging from the plot direction
I think Y3 WON'T focus on Suzune's growth at all. This topic started at the end of Year 1 and continued for the whole Year 2
Kiyotaka said she already exceeded any of his expectations. Yes, she can do other unexpected things, but the big step was already done (Y2V5)
Kinugasa and Tomose already praised her (also saying that not many people could grow like her)
Many major characters recognized her already. So I believe Year 2's Arc conclude this. Ofc she will continue doing her job as class leader & SCP and working hard as usual.
I think author also won't focus too much on exams or new 1st year students, because that would be very repetitive
Instead, Kiyotaka's true nature will be the main topic and I'm sure she will lead those people who wants to believe at any cost he is a genuine guy. At that least the Kiyotaka's who has spent 3 years in this school is completely different than the monster he thought he was. Convincing him about this will be Suzune and others' most difficult exam.
I mean one of her main goals in her remaining time in the school is to understand him more than anyone else. It would be "cool" if she reaches the point where she understands him better than himself.
Anyway at the end of the story everyone will still trust and support Kiyo. Kinugasa's story, Protagonist at the end will be regarded as a hero, not a villain.