@ Porque, Jonathan David's numbers this season are good this season (21g in 30 apps), but his overall numbers at Lille aren't too convincing for a club like Barca (53g in 126 apps). I wouldn't call him a consistent goalscorer, but his numbers are decent. I doubt if he would come to be Lewy's sub when he can be a starter at many other clubs, especially at this point of his career when he needs to start games way more than ever.
Fair shout. I think the question would be, can he be the striker we need if we surrounded him with better quality than Lille.
Also could he perform a positive shift at LW, so he as you pointed out, wouldn't just be pure backup for Lewa.