Which is why it will have no effect on spacing. He shoots it at the end of shot clock and he's the only dude open. Way too much excitement in this thread over a 15' J.
It's what the 15 J represents. A steadfast commitment to improving his game. His time with Nowitzki's shooting coach will affect this FTs as well. Plus he mentions that he is working on lower body strength and a couple post moves.
This J is only one more piece to the puzzle of hopefully generational player.