Very true. Zoro is nowhere near as important as Sasuke in OP.
Funny thing is that I hated how much focus was given to Sasuke and ended up hating the character, while I wish Zoro had more focus.
In my defense, Sasuke is too much of an emo kid. Zoro is far better in that regard.
Pre-TS, it is true. But post-TS, she seems to lost some of her energy. My humble opinion.