Situation is what many here have been saying for a while - Rookie GM trying to play hardball with his pie in the sky wishes and other teams just sitting around waiting for him to admit he's being ridiculous. McCaffrey is 26, Hopkins is 30 and coming off an injury and a PED pop, even getting a 3rd for Hopkins would be above market rate for him right now because of his salary. McCaffrey had his contract restructured last season before the trade and his salary was $690,000; Hopkins has a base salary of $19.45M and $14.915M over the next 2 seasons, this is clearly a salary dump - He shouldn't be had for more than a 4th without AZ eating significant money, to think otherwise is ignorant by them.
This is like people selling a house and trying to charge you a premium because they spent money wiring the house for audio and wifi - I don't care about your add-ons, the house value is determined by the comp market, not your feelings.