12 teams is an extreme and 28 is still a bit too many imo.
I think the world could personally live without the entire pacific division except for the Lakers and the Suns. I mean who has ever cared about the Sacramento Kings or the Golden State Warriors, and the LA Clippers are just a bad franchise. In the east I would take away the Bucks, Cavs and um, the Hawks. And in order to get rid of the Orlando Magic I will also need to be cutting out the New Orleans PELICANS.
But that's not even, so I need to remove two more teams. The Charlotte Bobcats because not even Michael Jordan could make North Carolina care about professional basketball, and on the west the Utah Jazz would make an easy choice.
So that's 20 teams. Two conferences of ten, each with two divisions of five.
My ideal NBA.
Also get rid of the Timberwolves and bring back the Supersonics. Sort them as you please.