Also by my quick count the USHL had 30 players picked straight out of the USHL last year including the USNDP players, but not including guys like Eichel or Proverov who both played USHL at one point but where drafted out of hockey east and the WHL respectively. The WHL had 34, the OHL had 31 and the QMJHL had 30. I'm too lazy to go through the entire draft but I'll do the top 20 picks to show how anyone with USHL experience were picked. In the top 5 there were 2 guys with USHL experience to 3 with OHL, in the top 10 there were 4 guys with USHL experience to 4 with OHL experience, 1 with WHL experience (Provorov was in the USHL and WHL), 1 with QMJHL and 1 SM-Liga. In the top 20 it breaks down like this.
OHL (6): McDavid, Strome, Marner, Zacha, Crouse, Senyshen,
WHL(3): Provorov, DeBrusk, Barzal
QMJHL (4): Meier, Zboril, Chabot, Svechnikov
USHL (5): Eichel, Hanifin, Provorov, Werenski, Connor
SM-Liga(1): Rantanen
MHL(1): Gurianov
SWEHL(1)- Erikson-Ek