I'm wondering if the child is a tie up somehow to Amy's "might be pregnant" thing, photo of her with the baby in the room etc... Possibly her baby/child - could be a link to the Dr with the child seeming to regenerate or similar at the end. The Doctor already has one daughter. Or it could be a timelapse thing relating to River Song and her secrets! Maybe her and the Doctor's baby? Could be all sorts with the writers!
I'm crap with all that kind of thing though, I never watch it closely enough!
I think the Dr should be at least a little fanciable as well and he just doesn't do it for me, he's just too young and just not quite the Doctor for me.