The Brewers biggest need at the deadline is a veteran post-season caliber starter. Because can you really trust that each of Miz, Harrison, and Henderson are going to be healthy and pitching at their best come October? Considering their youth, injury histories and/or innings totals? You maybe could've when Woody was still an option, but not with him out of the picture imo.
Skubal obviously fits the bill better than anyone out there. Skubal's teammate, Mize, is another sneaky (less expensive?) rental option. Otherwise, I'd probably prefer that they get someone with multiple years of control remaining, especially if they're going to deal from the very top of their prospect pool.