Yeah, I did wonder about that. Rose, Martha and Donna's families were featured pretty extensively.
Maybe Moffat means this is the first time that he will be exploring it extensively as the showrunner. From what I have read of the leaked scripts, it seems to be the case. Clara is not very impressed with the 12th Doctor in the first episode and this will probably be touched on more in later episodes as well.
My #1 fan theory right now is that the "leaked scripts" are a hoax to hide the real direction of the show. Which is: the 12th Doctor is actually the Master. Not that I have a problem with Capaldi, but I think it would be an awesome twist.