you're imagining that value. the more he makes, "team friendly" or not, you're going to limit the number of teams that could go for him and certainly limit the return. the braves got a pretty big return for this guy. yes, they're in the form of prospects, but they just got a new number one prospect in their system in a guy who is pretty close to being major league ready.
they can then at some point turn that savings into somebody else to help the club down the road. in short, this is a hell of a return for a defensive specialist who probably has already physically peaked.
Yes if your goal is to trade him then the sooner you trade him the more value you should get. My point is that he shouldn't have been traded. He was here for 5 years at a very team friendly deal. He should have been one of the building blocks going forward. But since I guess the 2017 window is no longer there then there is no point in keeping him. Presumably Miller should be next if he we can't buy out 2-3 years of FA as he will get expensive by the time the Braves want to compete again.