Draft express does a better job scouting players than anyone out there I've seen.
But Green has been in the league 4 seasons, playing every season next to elite scorers at their positions. If he was a great passer at any position, he would've shown it more.
A lot of players have skills that are elite in college but don't for whatever reason translate into the NBA or aren't a part of their game that necessitates use much.
For Green, I think it's 2-fold: 1) he has the ball a ton at Georgetown (he was always known as a 'jack of all trades, master of none' kind of player), and because he had the ball so much, and because he's naturally deferential, his passing was much more of an asset. In the NBA, he just hasn't had that role often, if at all. 2) he is all that great a passer, good for a big man maybe, but as a 3, is he really all that better than Chandler Parsons? Rudy Gay?