Clara's stuff was fun and entertaining - her scenes with Smith particularly, I do love the ship teasing - but she did seem to slip into commading way easily. The kids were... well, I'm glad they were in a coma for most of it. The girl especially.
The Doctor's last line of the episode pretty much shows that they are going to continue with the shippy stuff. He's obviously attracted to her. It'll be funny going forward.
As for the girl, the way she says "stupid" makes me think she's the same girl they used to play the young Melody from Let's Kill Hitler.