Think your math is off there. Sandoval at 3B, Hanley LF, Bogaerts SS. Castillo CF, Betts RF.
Cespedes has to go, for sure. Nava likely also goes. Vic is 4th/5th OF at this point, can't trust his health. Napoli is a potential to trade if they decide they are stuck with Craig. Holt is your utility IF, Craig is the other loose end. to be sure, Boston won't get rid of one of their two top prospects just to clear space for the scraps you mentioned. JBJ goes to Pawtucket. Also still Middlebrooks to figure out, but he can be optioned to the minors as well.
Pro baseball is not like playing OOTP against the computer. You can’t just wave a magic wand and make Cespedes, Bradley, Victorino, Craig, Nava and Napoli all disappear for quality returns. If you're sending JBJ and Middlebrooks to AAA, they're clearly not having them in the plans since they're being buried behind huge money.