I live to poke holes in commonly held beliefs, it's in my contrarian nature. Everyone just assumes that Kazuha in particular is the best dancer in the group because of her ballet training but i've been carefully watching some of their performances and i'm not quite sure she is. Look at this spin move, i think Sakura pulls it off perfectly, while Kazuha seems off balance towards the end. As an aside, Eunchae seems to completely miss the setup (her launch stance is different than all the other girls).
The moral of this story: Never doubt the resolve of Sakura. Everyone claiming she is getting outshined by rookies is living in a fantasy world. And with respect to Kazuha in particular, while everyone screams about her dance and visuals, they don't make an impact on me at all, her strongest trait is her vocal tone, she has a really charming vocal color for both speaking and singing/rapping (lovey lovey lovey and her rap verse in Fearless).