The only guys I'd consider moving is Black, Quintana and Rodriguez.
Black is somewhat a victim of circumstance. Few MLB at bat sample size, sporadic playing time, injuries, no clear position that isn't blocked or not a good fit. I was hoping he could be an Alex Bohm type fit at 3B this year - average glove, good contact / batting average, 15+ HRs. At the least, I thought dumping Bauers last offseason was with the intent of giving him the backup 1B job as an audition for post Rhys. Just didn't happen. Not enough power for everyday 1B or DH. Blocked by a premium defender at 2B, Tons of other prospects coming up. The hourglass sand has just about run out for him in Milwaukee's plans. I hope he hits the crap out of the ball in Nash and raises his trade value.
Quintana is simply not on my radar. I don't get too invested in ACL level players. If another team is excited on him, good - take'em to the cleaners.
Rodriguez is simply a matter of higher value trade bait at a position of current surplus.
The Brewers also have a surplus of thumpers on the farm. For a franchise so woefully deficient in HR power at the IF and OF corners, I would be super hesitant to deal any of the infield prospects mentioned. Not all of them will pan out into big league HR hitters. They are the proverbial "multiple bites at the apple". MIL is not going to get what it needs (or can afford long term) for today's team by dealing these prospects. Let playing time and performance sift them out a little bit more. Then trade high if you need to.