I think it's fair to say that the straw hats were clearly main characters of the first half. They've taken a major backseat in the second half besides like Luffy and Sanji during Whole cake.
Depends on how invested you are in the crew vs the larger plot if that's good or bad.
http://i498.photobucket.com/albums/rr345/Rakaputra/B8%20Girls%202012/pjbas.png