Sesko is maybe a bit undercooked — but it’s not by much. Don’t really think he is behind someone like Nunez — who do great much with his pressing and runs — by much and I would take Sesko over Vlahovic right now for sure.
Best thing for Sesko now is to play football I think, and I don’t see him as ready to be relied upon weekly by United. Of course, we could still just play him weekly anyway, but that is unlikely to work. After two years of not being good enough, there’s likely to be anything left mentally to just become great. If we were an all conquering side, then I wouldn’t mind him in the team contributing and improving at his own pace. But as we are, we actually need significant contribution from our 9, so if he isn’t ready, we simply won’t be good enough. We can’t have that for a year or two.
If there was a way we could sign him and send him to say, a PSV (or depending on our owners - Nice), I’d love it. Timing isn’t perfect with him I feel, this summer is a summer or two too soon for the move to make the most sense of him coming into our first XI and improving it.