Casting aside, I've grown fond of this regeneration, so beginning his era is a nice change! I much prefer watching Clara with Twelve over Eleven. As Madame Vastra is quick to tell Clara- he's not your boyfriend! And she finally gets that now that he's an old man.
I may be even more excited to see Vastra and Jenny again than meet the new Doctor. I love them so much! They are so cute in this episode! Ahhhhh!!!!
And then there's Dalek stuff, like, whatever, I'm so over Daleks. Old news.
So, answer our question- What would you change about the Daleks? Not the plunger, right? That's their defining, most practical and useful characteristic! Entire plots hinge on the utility of their plungers!