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Nick already has a) a very large ego about his future as an All-Star caliber player and b) a chip on his shoulder about being passed over for Miller and "worst pick of the first round" level sneering in his direction. When you get somebody who can channel that kind of energy into increased production on his part... look out.
Too bad it won't be us. Ship him to someone who's terrible with player development. Wait, he's already ours, guess that won't work...