I think you're wrong in the context of the current team. The Twins have plenty of "all bat, marginal field" personnel. The Senators could, I think, afford to give up some fielding for Harmon's bat. The current Twins cannot afford to give up Plouffe's fielding for another bat. The Twins are currently carrying Nunez, Vargas and Arcia, all of whom have limited fielding ability. At this point, it sounds like Sano would be more of the same. Will Sano improve with the glove? I don't know. Of course, a couple of years ago, I would have laughed if you'd have told me that Trevor Plouffe would become as good with the glove as he is. I'd also point out the Twins infield defense has become markedly improved this year, not a little of which is due to the improved play of Mr. Plouffe.