This video's great and it includes interviews with Stan van Gundy and Shane Battier about how offensive and officiating changes have forced defenses to fundamentally change.
There's also some early discussion, centered on a clip of Rick Barry complaining about officiating, about how much better it would be if they would actually call travelling, carrying, and moving screens. I can't for the life of me understand why they don't call these things. The game would look so much better.