Players stop moving on offense when they come to the conclusion that they are not going to get the ball even if they move without it and get open. Your next step is to conclude that the only way you are going to get a shot is by taking one when you finally get the ball, even if it is not a good shot. This is not a recipe for an effective team offense.
Fields and Gallo were doing a lot of cutting without the ball yesterday- they rarely got rewarded with a pass when they did get open, and they frequently stood around when Amare had the ball because they know he will not kick it out to them of a drive. They also have to notice that Felton is more intent of trying to force a P&R than penetrate and kick the ball out for an uncontested J, and this does not exactly foster the kind of offense gets everyone involved.
The team does not have an offensive identity at this point, A lot of players can be blamed for poor or inconsisent play, but the coach or the PG have to take brunt of the criticism from where I am looking in.
No man is happy without a delusion of some kind. Delusions are as necessary to our happiness as realities- C.N. Bovee