I think the transfer market has been so bonkers for a while now, it seems to be correcting. Fewer deals, less money.
But that Bergwijn looks a good signing, much better that Minamino from what they've shown so far
It's easier to slot in right away for Mourinho if you fit his system. Klopp players take months to integrate usually: Fabinho, Robertson, Ox, Keita, etc. Unless it's a total finished product type signing a la Alisson or VVD, most of his recent signings took awhile to bed in.
Minamino was highly rated and looked good in the CL. He is raw though and will take time.