To add to my point about the standards needed to stay in F1 just remember that the likes of Heidfeld, Sutil, Liuzzi, Maldonado, Kovalainen who were all very good racing drivers who looked like hot shit when they first turned up in the sport with some of them even winning races, couldn't keep up enough to really make it in the end. You have to be as good as Hulkenberg, Perez, Bottas, Massa just to be sure of staying in the sport another year.