I think it's more D'Antonio ball that has been discredited than Morey ball. His teams seem to lack the discipline, structure, focus and dedication to succeed in the post season.
His high octane offense is fun for the players during the regular season, they win a lot of games and awards and score a lot of points, but come playoff time, when other teams are focused, determine and disciplined, the wheels fall off.
He let's them play loosey-goosey all year and then has zero chance of getting them to play with the kind of focus, intensity and urgency required to succeed in the playoffs.
He gets them to the post season, often with an impressive regular season record and HCA, but once there, can't expect them to change what he has made them - great regular season team that lacks what it takes to succeed in the post season.
BNM