If you can't assign your first season players to be coaches, just allow them to be college coaches if you have that option to import original college coaches to be NBA coaches.
Here is the list of college head/assistant coaches that I'd like to see be able to be imported:
John Calipari (UK Head Coach)
Eddie Jordan (Rutgers Head Coach)
Chris Duhon (Marshall Assistant Coach)
Damon Stoudamire (Memphis Assistant Coach)
Kevin Ollie (UConn Head Coach)
Avery Johnson (Alabama Head Coach)
Michael Curry (Florida Atlantic Head Coach)
Mike Dunlap (Loyola Marimount Head Coach)
Steve Wojciechowski (Marquette Head Coach)
Chris Mack (Xavier Head Coach)
Jay Wright (Villanova Head Coach)
Greg Gard (Wisconsin Interim Head Coach)
Mark Few (Gonzaga Head Coach)
Eric Musselman (Nevada Head Coach)
Tom Izzo (Michigan State Head Coach)
Tom Crean (Indiana Head Coach)
Chris Collins (Northwestern Head Coach)
Mike White (Florida Head Coach)
Bruce Pearl (Auburn Head Coach)
Linc Darner (UW-Green Bay Head Coach)
Rob Jeter (UW-Milwaukee Head Coach)
Chris Holtmann (Butler Head Coach)
Dan D'Antoni (Marshall Head Coach)
There are more, but these are the only ones I'll mention.
If you import any college coach to be NBA coaches, the players that don't have the right HOF rating can't go to NBA coaching right away, they can, if they retire, become college coaches that can later be imported to the NBA coaching staff pool.
Like Hoiberg from Iowa State to Chicago and Donovan from Florida to OKC in real-life, I think this would be a great addition for the NBA 2K series.
Also, I understand that this gets old, but I'm not trying to spam.