Delaware has 2 points of emphasis. No hand checking the ball handler. Been in place for 3-4 years. Adopted from college to score more points. & The new one of either nor the shooting team or rebounding team is allowed to cross the free throw line until the ball hits rim. Pretty much to take away kid running to get his own miss & so the rebounding team doesn't take the shooters legs out.
The ultimate reason to why there not so good is the "not my call" attitude. Ref B has best view but Ref C has to make call cause he follows behind or something like that. 3 guys call, call what you see. Also as much as I hate to say it, they have to find a fountain of youth. They supplemented it by putting almost 3 refs in any decent varsity game but they can't keep up with the uptempo teams.