It'll probably be dealt with later, since it's rare to have any purely 'stand alone' episodes of DW these days. It's all Whedony. Some things seem to be planned way in advance, and yet still, other things seem to happen right off the top of the head. It's weird.
I know how you feel about Eleven, Booker, but I'll still miss him, like I did Ten before him, and Nine before him and so on and so forth.
I'm sure Capaldi will bring his own best and I'll have reasons to like him too. Like I do all the Doctors, really. I don't really dislike any of them.