I think one of the problems is that X Factor Results show drove the ratings since 2009. The last two years have seen lacklustre stars perform and overload of ex XF acts.
In 2009, the first year of Sunday result shows, Saturday Nights were still hovering around 9million, but the results shows was above 10. Then in 2010, the results shows were getting 13m plus ratings, and over 10 million tuning in on Saturday Night.
They need to stop with constant promotion of ex acts on the results shows, and get some big stars in again.
People like Leona Lewis and Olly Murs, may be popular, but are not drawing in the viewers people like Lady Gaga and Black Eyed Peas would.