There is a reason Everton paid so much money for Lukaku.
He does have the ability and at times that is not in doubt. The only thing he really needs to do is get that all important consistency added to his game and he will be a force to be reckoned with.
Add to that the fact that Lukaku will have a sell on value of far more than Everton paid for him and you can see how it is a win, win situation.