Is Modric really what Real Madrid lack?
When they have Alonso and Oezil, I think they are right to have a runner as the third midfielder, even though I don't think an awful lot of Khedira.
It gives them an option for big games - I don't particularly like the balance of their team when they try to play 4-2-3-1 against good teams - to play 4-3-3 with Oezil or Di Maria being dropped to give them a bit more solidity and allow them to retain possession better, though.