I am cautiously approving. I don’t think that Moffat has an idea of the Doctor as stone-cold action hero (fisticuffs and dramatic firing of pistol aside), but the eleventh doctor certainly seems more actively inclined than some Doctors (and frankly if you’re going to cast Matt “I am older than twelve” Smith as the Doctor, you might as well make his Doctor be active) and that seems a nice change of pace.
On the other hand, I’m pretty sure that in that brief one-minute montage Moffat promised to reference or refeature every single plot he’s contributed to the previous seasons of Doctor Who barring a child in a gasmask saying “are you my mummy,” and that’s always a bit of a worrying sign even if the ideas were good ones. Then again, he’s never written about the Doctor versus swordfighting vampires before, and… swordfighting vampires! Versus the Doctor! How can you not be willing to give that a go?