JK needs to back down on some of his virulently anti-EU stuff without losing face
Very astute. The thing that helps me understand modern politics more than anything else was my time years ago as a (moderate) fan of professional wrestling.
This is LK doing a face turn for the EU, he's hoping that Morawiecki can get himself over in Brussels and put him over too. He's assuming that the marks will go for it (PiS enthusiasts have lots of experience of sudden about faces). He's probably looking for a new main heel to take Tusk's place.
It's only confusing if you forget it's wrestling....