I don't see the downside from any angle. DDR is your 1 for 1 offensive replacement for Jimmy over the next year+, who doesn't screw with their want to have cap in 2027, you finally get out of the Kuminga distraction while saving some PR by sending him to the place that wants him and that he (reportedly) wanted to go.
Kings get the flier on a young upside player to see if he really was held back by the Warriors.