Joselu definitely is not a world class player except if we have downgraded the phrase world class. He also not a bad player but rightly has you have said he definitely needs to leave Madrid because his game time is definitely gonna reduce drastically, it’s not only about Mbappe but also Endrick is arriving to join the already star studded attacking options Don Carlo has.
Serhou Guirassy will fit into just this Dortmund side but is it the right move at the moment? I will say No, reason been that Dortmund already have enough players in the striking position, the likes of Fulkrug, Haller, Donnel Malen can also play there. I think his game time will be limited and he doesn’t need that at this time of his career. I fancy this guy a lot at United because he would be adding something different that Hojlund currently lacks which is to bully defenders
It depends on who's coming in as manager, when you compare his goal conversation rate with that of these names mentioned above, you'll see the importance of the chase for Serhou Guirassy.
He made the chase for the Bundesliga highest goalscorer award competitive with Harry Kane and it's good to see that Borrussia Dortmund is chasing after him.
Sebastian Haller hasn't played well before leaving for African Cup of Nations Competitions and also after returning, they need to add him up to the squad immediately. Not even Füllkrugg and Malen has enough goals to compare.
Too much has been said about Joselu and I do think you're right. He won't be with them for next season. Asides Kylian Mbappe, Vinicius Junior, Rodrygo and Endrick, they also have Àrda Guler and Brahim Diaz fighting for game time. Joselu wouldn't be retained.