 Melo can move his feet. I don't think Luka can shuffle his feet quick enough to be able to stay in front of defenders. Maybe one of those rare guys, but most talents in the NBA, mentally, if they put their mind to it, they could play defense. I mean, a small point guard going up against a forward, yes, you're just going to lose that every time. Just draft for offense and see if you can instill a defensive mentality into them.