with the violence of the game, and the small window of production that most players have, a d league wouldn't accomplish much imo. probably only get a handful of players that would ever make it to the nfl and then they'd be one-and-done most likely. costs would outweigh the benefit.
Should be in place of college. Dump the 3 years after HS graduation requirement.
Bud Adams told me the franchise he admired the most was the Kansas City Chiefs. Then he asked for more hookers and blow.