I'm not a big believer in players getting "broken" by being called up too soon. If their confidence is completely shattered by scuffling at the major league level, they're probably not a long-term building block anyway. Even established players will slump.
In a perfect world, none of Dozier, Escobar, or Florimon would be even considered as a starting middle infielder for a major league team right now. But the Twins have made their bed, evidently because they think Dozier is closer than you think.

