This season has been awesome. Capaldi killed it, and so did Clara, in fact.
As for this particular ending, I'm a little torn. I will soon watch it again so my thoughts will clarify... Danny as Cyberman is certainly gruesome and horribly sad, and Samuel Anderson absolutely makes a memorable, season long character work in a way that a lesser actor could have completely ruined. And Michelle Gomez is amazing - NEED more of her. (Some real dastardly shit when she kills Osgood.) But at the same time, the Cybermen hardly seem a threat; let alone this cloud-thing that is an oh-so convenient solution to get rid of the cybermen and... actually, I'm not really sure what happened.
But while this one doesn't dish out the carnage (and tears) quite like 'Doomsday', for instance, it's a little more understated, and I think that will bode well for future viewings.
Overall though, GREAT SEASON. Can't wait for... Nick Frost as Santa Claus.
Throwing a theory out there: Clara's pregnant.

