Bagley should play at the 5 to take advantage of his height and speed. He looks more comfortable right now. It also puts him in offensive rebounding position, which is a strength of his. He created two extra possessions in a previous play.
This goes for all Kings: Their bigs are doing multi-move spots to attack in the lane against multiple defenders. I don't think this works well in the modern game. I've seen Willie and Bagley both do this. One or two moves, score. That's it. Quick entry and quick attack before help gets there.