I am operating under the assumption of an OD outfield of Frelick in left, Mitchell in center, and Taylor in right. Three relatively young CF-types (in other words, they get to a lot of balls). So, defensively (for those who defend the shift of Braun from 3B after a ROY season), it's hard to top that. Maybe you work Yelich in the OF part-time to give them breaks, but out of the six of Frelick, Mitchell, Taylor, Ruiz, Perkins, and Yelich, the 2022 NL Gold Glove finalist is sixth out of six defensively.
On the flip side, if he's not running all over the field to make catches, perhaps he stays healthier and the offense goes up. The shift ban will also help, true, but DH Yelich could be a 3-3.5 WAR guy at worst. Maybe he gets back to the 2018-2019 form. Even in 2020, his ISO was pretty good, his BABIP was an outlier.