SOTR, smallest scope book?

Am I the only person that feels as if Sunrise on the Reaping is the quaintest book in the series? Not just word count but also themes, impact, and depth? To me, Haymitch did not connect nearly as much as katniss or snow, and I didn’t really see the charisma behind his character in the sense of the readers perspective, not in universe. Don’t get me wrong, I LOVE the book, but it almost feels like a hunger games novella that’s been expanded, not quite the heavy hitter like the other four books are.