Any contribution from Dominic Calvert-Lewin this season I'm regarding as a bonus.
If we sign Diaz added to Maupay, it's a certain downgrade on paper to Richarlison and Dominic Calvert-Lewin.
I don't think we are in the zone to pay big for a more reputed forward though. I think it's important they try to add some additional spark/creativity in the form of someone like Pereira.
Additionally Dominic Calvert-Lewin/Richy got what, about 15 between them last season? We never replaced Lukakus goals and are still in that position.
It's critical we get some luck with injuries. We'll get 8-10 goals from Maupay because that's what he does, and I'd be reasonably confident Diaz could contribute the same.
It's the context of the games in which goals are scored though and that's where Richy in particular is missed.
We don't know on Diaz as a PL forward if signed. He cannot be accused of failing to score goals in a league he has not played in. If he played in France and got 22 goals, many would be delighted with him.
I'd prefer Broja myself and we may still get him but given the overall set of circumstances Diaz at least has potential. It's important that we try to add some creativity though.
We need goals from across the team, Gordon, Iwobi etc and the shape must reflect that need. Not a flat back 5 with 2 in central midfield. That must go.