May aswell throw in Scolari who won the World Cup where is he now, I'm sure he has just been sacked AGAIN
It's a risk mate. Ramos came into the league on the back of a fantastic record at Sevilla and bombed, Moyes came in only having managed lower leagues and did well. You can't always tell.
Getting someone in new is always going to risk it not working, but there are options is my point. Whether a young promising manager like Poyet or Solskjaer or an old manager with a great record like Rehhagel who might have lost his touch.