The straw hat pirates have been separated for, about 4 days. (To us, 3 years). They've done and experienced so much in that little time. First of all, they've been sent to places that is beneficial to improving their combat skills, or beneficial to their dream. For Chopper, Robin, and Zoro, they've gotten a step closer to their dream, Chopper gets medical supplies from herbs and plants, Robin goes to a 700 year old bridge that was still in the process of being built, which was probably being built during the Void Century as well, and Zoro is going to defeat the unknown swordsman, or train with him, and become a better swordsman. Everyone else, Franky, Usopp, Sanji, Nami, and Brook, will all get their skills improved. (For those of you are confused about Brook's condition, Brook can make music that makes others fall asleep. He's now composing a new song. What would this song be able to do? Agitate the ears? Relax the listeners into laziness? Who knows.) Obviously, the separation was of some benefit. But would the Straw Hats be able to do this without being separated? Was the separation necessary, or unecessary?