Sarah Jane versus the Shark

So I've been watching The Sarah Jane Adventures for two full stories now, and I have to say I'm pretty disappointed. Whereas last year's series was a delightful surprise, this year, I'm wondering if it isn't a victim of its own success-- i.e., the production team, finding themselves with a surprise hit on their hands, go all conservative and start doing formulaic, predictable stories as opposed to the excitingly unexpected ones that they did last year. Last year we had stories with themes like the difficulties of coming to terms with aging and mortality; this year we get "moving away is hard" and "everyone has something to contribute, even the class clown," both of which are seen over and over again in children's media. It's early days yet so I'm hoping for improvement, but, remembering what happened to Doctor Who between Seasons 1 and 2, I'm worried.