I'm not sure what people were expecting? It is like the Tesselecta again, but only because fans feel somehow shortchanged because the twist makes sense? The essence of a good twist is that it should make sense.
Moffat's always been about smoke and mirrors IMO, that's what I like about him most of the time (that and the snazzy dialogue)
Yet again he proves, clever or not, that he's a great writer (IMO obviously)
I agree with this. It would have to be out of left field to be truly a surprise which would still upset people (however were we supposed to guess that?!)
I think if there is a mistake it was the attempt to make Missy's identity a season long mystery to begin with. The solution to such a long mystery is bound to be a let down. It can't possibly live up to the hype.
All in all, I'm fine with Missy being the Master. I hope we get an interesting Moffaty take on the Master. I also think we still have some upcoming revelations, big revelations. I don't know what they are but I don't think things are simple as they look.
Mr Awe