Almost nothing here makes sense for the NBA
You keep saying this, but when I counter that a player can get better coaching/training in college than he could in China, Australia, Spain, Germany, or the D-League, you have yet to respond. Tthey need to make changes to the game (reduced shot clock, better/tighter officiating) etc, but if/when they do, the borderline players that are drafted will be better off developing another year or two in college than they would be overseas.