I think there are many points in between going “All in”, making minor acquisitions to prop up the current team, and going into total rebuild mode.
I also think what the Brewers did reduced their chances of reaching the World Series from slim to slimmer. In combination with what other teams did, including the Cardinals and Phillies, I think their chances of missing the playoffs completely have gone up significantly. Those teams addressed some of their weaknesses while the Brewers did nothing to their hitting and arguably made one of their strengths weaker.
I don’t lump the Hader and Bush deals together because they could have done one without the other. I assumed they would make a deal to acquire a veteran setup reliever and that would give some support to the bullpen. But taking away Hader creates a cascading effect through the back end of the bullpen that might make things worse, and isn’t going to make it better unless you think that Hader’s recent problems were more than just a bad stretch.
As a matter of philosophy I’m good with trying to be competitive on a regular basis over hoping to hit the jackpot in a 2-3 year window of competence surrounded by many years of sub .500 teams (see KC Royals).
I don’t like the Hader trade because I think it made the team worse in the short term and disrupts team chemistry and familiarity with roles. I also don’t see that the prospects they got were so special that the Brewers couldn’t have made a similar deal in the off-season. In the off-season they might have been able to include Hader in a deal that would have returned an established hitter to cover one of the Brewers many positions of mediocrity.
I am also disappointed that the Brewers couldn’t pick up a veteran right handed hitting 1B/OF who could serve as a platoon with Tellez, provide some depth in the OF and at DH, and be a better PH option than what they have now. The Astros were able to get Mancini and the Mets didn’t make any big moves, but bolstered their roster with platoon pieces (Vogelbach, Ruf, and Naquin). The Brewers did nothing.