Draymond showed flashes of his basketball IQ ever since he came up. You knew he could do everything to help the team win, but nobody knew he'd develop to be so good at each thing. The skills were there though, especially passing. He was always aware of what he was going to with the ball before he got it, so i think he would have forced his way in eventually. The problem with Lee was his defense, and that would have continued to be an issue. Also, he lost his range with the jumper. Sooner or later, his ineffectiveness would have led him to the bench.