He scored goals for an awful Everton team. He should be able to score goals for a less awful United team.We know about his limitations but you could always rely on Lukaku for goals at the very least. No idea what went on last season in terms of the weight he put on and the overall performances.
That aside, there's still a brilliant player in there if he sorts himself out. Let's not forget how awful this United team is and the impact that will have had on him.