Re: 7X03 A Town Called Mercy (Grading/Discussion) (SPOILERS!)
I have to agree on all the points made above. Having The Doctor's changing character conveyed through dialogue and exposition doesn't help. The best stories are not told to us but merely presented ... allowing us to draw our own conclusions. And using Amy as his moral compass might have worked better if she had had more to do prior to that conversation. I think they're definitely trying to lay the groundwork for the Ponds' exit and The Doctor's new arc but the foundation is not yet solid enough.
"Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying."
--Arthur C. Clarke