I think we might be underestimating Lukaku in terms of experience. Belgium isn't the worst league in Europe, and Anderlecht are a decent side. He made 98 first team appearances for them in 2009/10 and 2010/11, scoring 41 goals and making 18 assists. I don't know how many full games he had for West Brom, but his Premiership stats for them were quite impressive, 38 appearances, 17 goals and 4 assists.
He's obviously an early developer, big and strong, he's been playing with seniors at a decent level since he was 17. I think he's ready, maybe not to be our first choice immediately, but I don't want to see him loaned out again or spending another frustrating season just warming the bench. Lukaku is almost like a new signing, he didn't get much chance with us before. Forget his age, he's only a year younger than Neymar.
If we get Cavani, we need to ship out Torres to make it work..in my opinion. If we are unable to find a buyer for Torres, I'd be prepared to see how things go with what we've got. Lukaku may be a complete and immediate revelation given a real chance with the play-makers we possess. Torres might just respond to Mourinho, though I admit that's a long shot. We have Schurrie to provide extra punch up front, and we probably haven't seen the best of Demba Ba.
We appear to have missed out on Paulinho, why is there no more talk of Fellaini ?