As they mentioned last night on the broadcast, having Yelich means you can rotate more players into/out of the lineup to keep them fresh.
As for Dunn, I'm not sure what to think. His defense plays and he can put together pretty good at bats but he has a really big hole in his swing in the upper part of the zone. I would say the Brewer management feels he can learn in the Bigs, like Chourio, but his lack of hard contact lately has me wondering.
Bauers is a player that I think probably has the shortest leash, even though he can play in the outfield, too.
I guess they want Black playing every day in AAA rather than 3-5 days a week up here, if that's what it would've been. Some of these are good problems to have, IMO.