I saw it too!

Capaldi is evidently eating it up, and he brings a lot of high-art gravitas to the role, whether he's doing comic or tragic; I think it would have been good if the rest of the show had followed suit a little more [instead of playing with Hollywood action-movie, rom-com and CGI clichés] - because they've got the writers, the actors, and the facilities here to do a really shit-hot, narrative-character-and-plot-driven run of the Doc.
Imagine! One that's realistic and sober, that's actually not flashy or show-offy at all but still grips like a very gripping thing, without having to go FUN FUN FUN!! Yay kids!!! every other scene. Some of the writing, the restaurant dialogue as Ian says, was really very good, psychologically literate
and also funny [Sherlock must've helped there] - but then it's back to Looney Tunes.
Oh, and I HATED the incidental music. It should probably be done by 14-year-old girls with samplers and bowed guitars instead.
"To learn who rules over you, simply find out who you are not allowed to criticize" - Voltaire