HHD, Odor was one that was mentioned in the article as not "fully" bought in. In addition, his slumps are getting longer so I would put Sloak at 2nd and Kiner-Falefa at third and not look back and play "what could have been". This would mean Forsythe would continue as the infield utility player. While the 2nd and 3rd issues will sort themselves out, the article raised warning flags with Elvis. Not for not buying in, but his batting slump has to be cured.
I like Mazara and feels he brings a good work habit to the clubhouse, but your analysis is spot on. Choo, DeShields, Calhoun, and Gallo are not going anywhere.