I actually don't think the White Sox will be that interested in Quero as a headliner given the injury and the fact that they already have a top 100 catcher named Quero of their own in AAA (Edgar).
Pratt makes the most sense for them as a headliner if we assume (I sincerely hope) that Made is untouchable.
Then throw in one of our controllable OFers so that their FO can have something to show their fans and improve a horrific MLB roster. So, either Mitchell or Frelick.
Plus at least one more high upside prospect from the lower levels. Think Bitonti, Payne, Yophery Rodriguez.
Now, would I give that up if I were the Brewers? It's a tough call. Losing Garrett or Sal off the MLB roster would sting, but FA remains wide open with several potential replacements available some of whom possess the improved power this team could use.
Pratt hurts the most as I currently have him pegged as our SS of the future. But remember we still have Ortiz and Turang under control for 4-5 seasons each and also Made and Pena not too far behind Pratt.
Bitonti, Payne, Rodriguez, etc. all have high upside, but remain a ways away.
Overall, I think it comes down to how good you think Crochet will be over those two remaining years of control for a young, contending team that could use a top of the rotation type starter. For the record, I think IF HEALTHY (which is a risk in and of itself) Crochet is a top 5 starter in baseball, which would be worth it imo.