Honestly, the best I can tell from the few games I've watched this year is that we just have a couple basic "rules" for what should happen.
"If the ball is on the your wing, set a baseline screen for the opposite wing to run off of."
"If you're at the high post and the ball is on the wing, run pick-and-roll."
Things like that. Because it seems like guys will suddenly move for no apparent reason and a lot of the time it's not really helpful in getting a guy open. They just suddenly realize they're supposed to be doing something so they move to the place they're supposed to be in.
Doesn't seem to lead to a very cohesive unit.
And it doesn't seem to work.