Yeah... I have have a feeling that Sakura won't be doing much more in the series (not that she has done that much so far). She's always been more of a support character. For example, in the fight with Zabuza, she was just standing there. In the fight with the sound nins, she finally fought, but it was a hopeless cause. And i the fight against Ino, she did better and tied. But unless she starts learning some Jitsu, or someone finally pays attention to her and teaches her. She needs a teacher of Jiraiya's qualifications to teach her. Kakashi isn't helping her much at all.

About the team, I think the trio should be split, but Kakashi will still lead them sometimes. But there will be times when Naruto will be in a leadership role (check one of my past posts to see why he's shaping up to be an good leader). But I think they're ready. The level of the missions will be A or B rank missions to keep the anime interesting. But with Orochimaru and Sand in the background, I have a feeling all hell is about to break loose.