No spoilers. Well, not really.
Now that it's all over, in the US at least, this has happened and that has happened and I'm not sure that was a good idea and I can imagine new viewers being rather perplexed by the "oh and by the way he's immortal" thing.
Well, it was certainly interesting. Could have been tighter all round, ten episodes feels like two or three too many. Would make more sense putting outside of the Whoniverse at this point, though.
This thread about alternate "miracles" got me thinking about broad sweeping setting-altering events, particularly ones that affect humanity itself. Hooks like Miracle Day that would certainly work in-Whoniverse. Say as Big Two-Parters on the level of Army Of Ghosts, rather than whole series on their own.
This got non-Who-specific, so it went over here.