Yeah I agree about there being a media blackout. No speculative stories given to the press, just wait until every judge and presenter is tied in and make one press release and leave it at that.
This year skip the auditions red carpet the judges do in each city, no interviews during the audition either, no photo released of the judges sitting at the desk for the first time, perhaps even a social media ban about the show by everyone involved, obviously they can continuing using it just don't speak about the show. Try and create some anticipation for it by being completely mysterious and help create intrigue from the casual viewer.
Nothing about it should be revealed until the first trailer drops early August and everything should feel/look/sound different, if Simon for the third year on the trot says they are making huge changes but nothing materialises then they deserve to flop.
Though we all know they will do the complete opposite of this post, we are going to be saturated in X Factor by the time the auditions come around.