Since 2016:
Trevor Story: 21.6 fWAR, 112 WRC+, net positive defender up the middle, great baserunner
Hunter Renfroe 5.8 fWAR, 106 WRC+, net negative defender in corner OF, poor baserunner
Just rearranging the chairs over here... Granted, Schwarber wasn't replaced, but he only had 168 PA's last season. Unless you are trying to say that Story is as good at one position as Renfroe and Schwarber were as good at two positions? If so, then as long as JBJ is a positive fWAR guy, the team will be better off.