The real partnership btw was with EA/Microsoft, it's Kojima's production who is actually in partnership with Sony. No proof of a Sony/Konami real "exclusive parternship", there's no special legends like in Fifa or whatever else.
Think about it: what Konami got to win for remove the "importing image" option? Nothing, it deserves them. They're not in position to negociate the One policy.
The fact is only that microsoft doesn't allow importing image on ONE via usb, and they're not gonna change it for an unsignificant game like PES, in terms of sales.
You can blame Konami if that's suits you better, yelling at conspiracy, but the truth is much more simple than that.
Btw this year PC version will be the most enhanced... On Windows 10 (microsoft) with Nvidia.