Checks standings. Yep, we're still in first place while Dozier, Mauer, Buxton and Rosario are all under-performing offensively and Hughes, Gibson and Santiago are under-performing on the rubber. Our pitching is scary but I think it's a bit early to sell Dozier and Santana.
I don't disagree with your conclusion, just because there's not a great market for Dozier or Santana right now, but on what planet is Mauer under-performing offensively? He's got a 108 wRC+, his highest mark in 4 years.
And basically every other guy you list is within a rounding error of their 2016 marks (or career marks, in Dozier's case).