If we are indeed looking at Clara's descent into darkness, I take it all back - I love her arc (aside from making her super important to the Doctor's history). I'd love to see the Doctor dumping her back at her house after she disappoints him.
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Maybe by the season finale Danny is against Clara as well? Or maybe he doesn't actually tag along with the Doctor. The actor doesn't even know if he'll be back, he might just be a one-season character to flesh out Clara and the Doctor's hatred of soldiers.