Hamilton is fine for a utility infielder who is incredibly fast. I doubt he can maintain his walk rate with his lack of power which will cause his hitting to continue to shrink. He has a higher bWAR because the DRS scorer loves him. OAA says he's a bad middle infielder and an OK 3B giving him the same fWAR as Ortiz. Is he the worst thing happening with the Brewers' offense? No, that is Frelick, Rengifo, or still giving this current version of Perkins any plate appearances. But hoping a 29 year old suddenly becomes a starting caliber player is usually a bad bet. But given that neither Pratt nor Williams is doing enough in AAA to really push the issue in the infield I expect they'll muddle through.