Also, I'm not sure NBA fans would like to see the travel violations called a la FIBA - which is even more strict than in the NCAA, especially when it comes to lift the pivot before putting the ball on the floor. That would take away a big part of the NBA game, you'd see far less breaking down off the dribble, less guys getting to the rim, less successful fast-breaks. It's a big change, most American players who come to Europe take some months of practices and games before fulling adapt to the way travels are called (and some never do).
I frequently see NBA fans claiming the NBA to make changes on the officiating orientations and rules that pretty much resemble the FIBA ones (allow a more physical game, call the travel violation strictly, don't over-protect the shooters, allow zones, allow hand-checking, etc.), but I don't know if they were aware of how deeply that would impact the game - and if they actually would like to see a game where teams would rarely score more than 90 ppg, where big scorers would pretty much disappear, where jump-shooters would dominate the offence, etc.