Everything.
I hate the episodes which give me the feeling, that I have to know the old episodes before the new who. All this gibberish about the death of the doctor and this own timeline thing was too much. I don't get the context of all this stuff. I can't describe my problems in english.
Ok I think the time has come, that my mind lost the contact. I don't understand anything in the hole episode.
And wtf, who is John Hurt? And what is the name of the doctor???
Imo the breaks are too long. Now we have to wait until november. Then there will be ~5-6 episodes shown and than there is another break for several weeks. This is bullshit.