It sure would be exciting to see Caroline skate to dramatic music, like Yu-na's Moulin Rouge last year. For her to achieve that broadening of interpretational skills is perhaps akin to Mao's aiming for lyrical. Though Mao's not known for dramatic interpretations herself, is she? It is rather Yu-na who can do both dramatic and lyrical (though she can improve on her lines, which both Mao & Caroline excel in).
On the other hand, we had Johnny aiming for dramatic last year, and Kimmie going for lyrical, all in the name of broadening their artistic/presentational skills. Only history will tell whether these were successful/wise attempts. It might be that everyone's better off choreographing according to their "natural" style and working on their technical content instead... I think in Caroline's case, anyway, it is more critical for her to master the 3/3 this year instead of broadening musical selection. She can always work on artistic maturity later, but with hard jumps we all know that the later you learn them the harder it gets.