I dunno about ganger!Doctor being able to regenerate - if the Flesh is a perfect copy, maybe that's possible? I think he gets killed off though, having -one- Eleven is bad enough for the space-time continuum...

Yeah... the little things though, like him saying the exact thing Amy says at the same time, and telling Cleaves that they're at a cross roads and need to make the right choice... give me the suspicion that he's been here before, something terrible happened, and he's trying to prevent that. Possibly making it even worse in the process.