So, say what you want about Steven Moffat, but there's no denying that he is an old-school Who fan, and when he wants to, he can lay on the old-school fanservice thick. In just under 7 minutes, we've got a glimpse of the Time War, an appearance by the Sisterhood of Karn, an unambiguous nod to the Big Finish audios, and a proper regeneration sequence for Eight. Not to mention another plausible excuse to completely ignore the 12 regeneration limit - if Eight was technically *dead* before taking the Sisterhood's elixir, who's to say that it didn't kick off a whole new regeneration cycle?
I am curious about whether this mini-Episode has any resonance with people who primarily identify as new series fans. (Not that it needs to - that's why it's a web episode. But I'm still curious.)