Sebastian Haller has joined Borussia Dortmund and is back to Bundesliga after a fairly decent run with Eintracht Frankfurt and after being kinda poor with West ham. Revitalized his career at Ajax with 32 goals in 50 appearances. With much more attacking prowess that Borussia brings. He should thrive there.
I don't see it any better, because Borussia Dortmund have lost their talented young player, Erling Haaland. I would be more than happy if in the future they create talented young players and continue to keep them. Now I don't think it can replace the young assets that will give color to them in the future.