I miss much of the dialogue, perhaps as a by-product of the accent plus the speed of the dialogue. They seem to be speaking very quickly
It could be both. Neither have particularly 'thick' accents but I can still understand non-UK viewers having trouble. Capaldi also loves playing with the rhythm of dialogue which, while entertaining and dramatic, can get lost in the mix.
In any event, I have not warmed to the new doctor as I had hoped.
I'm still not sure if we're meant to. I like the character, but I'm not fond of the person, if that makes sense. He's colder, more cynical.... more alien.