The Warriors are in win-now mode. They get a better fit with KP. He can shoot, block shots, and not have the pressure as a primary creator, leaving Steph and Draymond to handle the ball. They move back from #7 (after the first tier of prospects) to get two mid-first draft picks for building their roster at a cheaper price.
Mavericks get another ball handler to take pressure off of Luka and solve the locker room issues between he and KP.
Thunder move up in the draft to #7 and take on Wiggins contract. He helps them score points but not win next year, maintaining the rebuild.