JV+Amir over Gray+Amir any day
Fields is a very solid defender, while JJ was apparently a bad locker room guy and was often risky on defense
I think it's pretty clear they got better individual defenders, especially at point guard. Fields can't be any worse than JJ, and Gray was terrible on both sides of the floor. Can you honestly say you were expecting this much of a regression because of the loss of JJ and taking minutes away from Gray? Not to mention taking Jose out of the starting lineup. And ross doesn't play nearly as much as Pietrus/Fields/Anderson/Mcguire who are all at least decent defenders.