Currently Greenwood is more of a second striker, somewhat like Griezmann. He's not only comfortable with the ball at feet but like Martial, appears to prefer passes played to him that way. And hence he doesn't make runs in behind, which is an issue if you're playing up top. At the same time he has a lot of work to do when it comes to playing his back to goal. I wouldn't say that part of his game is anything close to Martial, for example. Instead, he likes picking the ball in pockets of space, turning and then passing or shooting. Like Messi, Griezmann, Felix etcWhat about Greenwoods forays into CF suggest he is anything like a Haaland? Whenever you watch him he isnt even in the box, wherever his talents may be best served I cant see him as a CF, likes to drive into the box, but when he is expected to play inside the box he looks completely lost.
So it's a bit of a conundrum as he's obviously an incredible talent. His intelligence on the ball, technical gifts, balance and shooting (phenomenal) are all of a high level. But we need to be careful with a player like him whose game is currently built for a specific role and needs to be developed to expand in scope.
For me, I think developing him as a second striker is too restrictive for the team. It makes it difficult to play wide forwards for example. So I'd rather see Greenwood developed over the next 2-3 years to work on his CF play as he didn't have the pace for a winger and that isn't changing. If it's simply not possible then he'll be a second striker/RW who plays narrow.