It depends if he wants a partner for Torres, or someone who can play the same role as him in a 4-2-3-1... It would seem strange that they would change to 442 next season after finding a beautfiul balance with Torres and Gerrard allowed to play off each other. Going to 442 would also bring back the boring "Gerrard on the right" debate as Rafa always wants to holding players: Mascherano and Barry.
The thing is, they would be fucked if Torres got a serious injury. Kuyt would be pathetic as a lone striker.