Let's face facts Andrea has this in the bag like Sam Bailey last year. We are essentialy witnessing a long drawn out inevitable coronation of his triumph. XF will not be about who the winner will be [Andrea as Mel B correctly stated] but the twists turns cringeworthy moments judge fake rivalry shock elimnations and controversies, and Cowell knows this to ensure the series is not boring due to a predictable [but worthy] winner.
Despite there being more decent singers as competition than last year [Paul, Fleur, Ben, Jack, Lauren, OTY and Lola as opposed to Nicholas McD and Hannah] none have that little extra to win and that won't change as Andrea just has that charm. Only Ebola can stop him