He's got 1 league goal. I don't see how anyone can confidently predict he's going to be a decent top flight player. Not saying he isn't but the performances haven't been good
Can you remind us all how many goals have we scored in total? Yes, exactly.
He's not the natural finisher Lukaku was at his age, but he's got a far better first touch than Lukaku will ever have, he's got a decent turn of pace and is always looking to isolate and beat defenders.
What he isn't good enough for is to be the lone striker/target man/battering ram/winger/universal outball in a dysfunctional team. But then not many players are.
He needs to work on his heading (he's good at flicking on long balls forward but not good at heading on goal) and his upper body strength. And he shouldn't be played all game every game at his age, but that shouldn't even need saying.