I think playing in a two striker system is taking some opportunities off him. Also played some games as AMC behind Openda where he's clearly not as comfortable.
RBL is also struggling to create chances this season. They are last in BL in SCA and midtable in GCA.
Assuming we get him (we won't) I wouldn't be concerned he wouldn't get into enough scoring chances playing alongside Lamine, Raphi and Pedri. Even in a different system if/when Flick will leave.
This looks (very) good too.
All of this could be understandable if he has any history of being a big goal scoring threat, but he doesn't.
Your argument feels like the one that was used with Roque, a new system will make him shine, turns out it exposed his weaknesses (and I am fan of the kid btw).
Players could shine in new system indeed, but odds are always against it. tbqh I would take Ferran/Lewa next year over signing Sesko next summer, and hope we will see more improvement from him if he stays.
Lewa for all his faults, has awareness about where he should be and where his teammates are, he can create chances for others by dragging defenders for example, he is a part of the system. Ferran also has that, one of the smartest attackers out there, just with poor finishing and confidence issues. Those are integral parts of Flick's system, and not just a byproduct of it.
If Lewa decides to leave this summer, and we have to go for a striker, then yeah Sesko might be worth the gamble.
With Olmo and Flick here, I would bet that the club is fully aware of him and what he can do and what not.