If Gimenez doesn't start hitting, he might lose some 2B playing time to Clement.
They simply can't justify benching Barger or Clement, they are too good and have been too good.
I don't think it makes sense to put Barger's 3B development over the importance of fielding an optimal lineup, though.
LF - George
CF - Varsho
RF - Barger
3B - Clement
SS - Bo
2B - Gimenez
1B - Vlad
C - Kirk
DH - Santander
George gets regular games off and a bench OF plays.
Santander gets some regular rest days and a bench OF plays (George DH)
Gimenez gets some days off if he isn't hitting, and Clement slides in there with Barger covering 3B.