Machado has already proven he's an elite defender at 3B at the ML level, and he's got a high baseball IQ. His hitting needs improvement, but I don't think you send him down just to work on that, especially with the premium Showalter and Duquette place on defense. Machado didn't hit great in his two months in the bigs, but his glove was a huge reason the team improved. No way he even sniffs the minors next season.