Thus far theres only two kids who got through to the final due to legit talent IMHO
George Sampson and Aiden Davis
The worst case was Hollie Steel, she wasn't a great singer, she only got through due to cute factor and since she started crying, if she hadn't started crying she would never have got the sympathy and cuteness votes and the Soprano guy from the same episode would have gone through, who had far more talent than she did.
Hollie Steel, Shaheen Jafa-whatever, Natalie Okry (probably the best of these names), Chloe Hickenbottom and now Ronan, all little kids with nothing more than cute factor who probably shouldn't have made the semis and definitely not made the finals
The thing that annoys me most is they kicked out that amazing dancer, Michael, the French guy, who had a hundred times more talent than Ronan (then again he was up against Razy who is the best act in the competition this year by a wide margin)