There are plenty of teams who run good offense without great players. The Pacers are one of the best offenses in the NBA and they definitely don't have any great players individually.
The problem is the pieces we have are weird fits and Quin hasn't really changed the offense as much as he probably should to accommodate the wonky fits.
I agree with you. Snyder offensive system should adapt to the players of the roster but instead he wants the players to adapt to his system.
Unfortunately Quin seems inflexible with his conception of the game. I think he is a fan of the slow-paced European Basketball.