It was obvious that this was going to happen for sometime now. She is a very good actress which you would know if you have watched Broadchurch.
That being said, it is difficult to imagine Doctor Who being anything other than a man, guess it will be a wait and see if this works thing.
Don't piss off old people.
The older we get the less "life in prison" is a deterrent.
I love how the Earth rotates, it really makes my day