No conferences in the postseason is a good idea but you'd have to change up the schedule. More teams would have to play each other an equal amount of times. Also, I think the East is going to re surge once the 76ers and Bucks get right.
The second change will not happen. No way NBA gives up the potential one-two games that come with a best of seven. I don't think they will add the play-in either because it decreases the value of those november games that your team should not be resting players for.
RE: Three Changes to NBA Playoffs I'd Like to See