I don't think Simmons or Ingram is some kind of franchise savior. Simmons is a great fit as a 4 in the modern NBA though because he can guard inside and on the perimeter, rebound, handle the ball like a guard, and score inside. Even if he never develops a reliable jumper, he is still going to be a very valuable player. I see him as a better version of Draymond Green who can create offense on his own much better than Green.
Summary: Miller is a terrific talent who can score the basketball in a number of ways, but surprised many by leaving Waco after his freshman season. He has lottery potential, but his thin frame will be a problem as he transitions to the next level which is why he could fall into the 20s. Had he returned to Baylor for his sophomore season, Miller could have really helped his stock and possibly emerged a surefire top-10 pick.
Player Comparison: Nicloas Batum. Both Batum and Miller rely on their length and athleticism since they lack a great deal of size and strength. Miller is more of a natural scorer, but both players can stretch defenses with their outside shots.