There's two main things that have seemed a bit off to me about this latest series - the disjointed nature of some episodes, and the way in which they're generally resolved. The first episode is a good example of the disjointed part: it opens with a dinosaur in Victorian London vomiting up the TARDIS, at which point the dinosaur then largely becomes irrelevant apart from some cheap jokes. We then get to the real part of the episode with the clockwork automata droids and the dinosaur is almost completely forgotten about. It's as if there's two completely unrelated episodes mixed together.
On the resolution, I think there the issue is that things aren't resolved by defeating the big bad, or coming up with some grand solution or whatever. Instead it's kind of "here's some big scary thing - oh, but it's not scary after all". Like in the episode with the thing underneath the bed, which just turns out to be because Clara once hid under the Doctor's bed. Or the forest of trees which turn out to be friendly trees.
I dunno... then again, I still think the best Doctor of the new ones was the ninth one. Ten was a bit on the silly side, and eleven was completely bonkers in a "you idiot" way. Twelve... this one has potential, which is why I'm annoyed by how it's gone so far. Anyway, enough ranting - by and large I did enjoy the episodes, and that's what matters.