I liked Caroline as a rookie but she's certainly one of those whose blossomed in her second, like many of them have from her rookie season. The second-years is one of the strongest crop they've had in years. I could see many of them as point in future. They look like they have a real bond as a smaller group too.
I think their rookie season, you're just trying not to screw up and fit in with the squad. In year 2, if you can get past auditions, you can just enjoy TC and relax a little more. Yes, I know you can still get cut but dance is always much more enjoyable to watch if the dancer looks like they're enjoying it too!