I actually think he could do a job still off the striker as Rafa, I assume, had initially planned. He could play a sort of "Totti" role, and not have to move much, while threading balls through, and scoring goals as he's still one of the best finishers in this squad.
However, as Macca has pointed out, I think/hope he will grow into this role. He needs to start thinking more callously and tactically, whereas in the past he was more gung ho in his approach.
Yeah, I wanted to see that tried out as well but I guess now we have a couple players that are more suited, e.g. Coutinho.