IMO development is a factor of PT, coaching, and of course skill-set, talent, physical ability, maturity, drive, etc. Say individual ability. You will develop to whatever level of the first 2 you receive combined with the 3rd. So let's assume the 3rd one is solid, like most rookies taken in the first say 10 picks. If you are getting little PT but great coaching you will develop some, but you can only learn so much without time to put it into practice. If you are getting tons of PT and no coaching maybe the same, although then the worry of bad habits sets in. If you are getting plenty of PT to put learned skills into practice combined with solid coaching both in practice sessions and in-game, then it stands to reason you will enjoy the greatest development as a player, up to your personal threshold. There comes a point of course when coaching starts to mean less and personal will to improve is what drives the improvements. But in the first couple of years for a high pick it is hard to argue that PT does not matter as much as coaching. Look at Kobe for example. Had the physical ability and talent, was given PT and good coaching. Didn't turn out too bad when his personal drive started defining his play. Would he have been the same player if he had spent most of his time on the bench his first 2 seasons, or in the D-league? Tough to say.