No one contests that the deal backfired spectacularly as it pertains to this season. Though, I will note, from Stearns' perspective, that Rogers was almost as good as Hader since 2018. Yes, he was struggling a bit at the time of the trade, but so was Hader. Hard to foresee how a guy who has been so HR averse over the course of his career (including the first half of this season), would start serving them up like ice cream on a hot summer's day. Even then, Rogers still outperformed Hader post-deadline. Where the trade really hurt was its impact on team chemistry, as evidenced by the comments from Devin and Lauer. No coincidence that we played some of our worst ball in the immediate aftermath of the trade.
Where people diverge, however, is the notion that the trade is ALREADY a huge failure that should cost Stearns and Counsell their jobs. Hader, while one of the best closers in the game, had limited value as a player with only 1.5 remaining years of team control, and who was growing more expensive by the year. While we may personally feel that he should be worth more as a Hall of Fame-level talent, his value is only as good as the market is willing to pay. And that same market was only willing to give us Andujar and Frazier back in the offseason of 2020 when Hader had 4 full years of control and was at the zenith of his powers.
Really, to accurately judge the trade, we need to compare Hader's value over the last 1.5 years of team control with that which we have received/will receive from Rogers, Gasser, and Ruiz (the Lamet thing is a whole different discussion). As of right now, the trade is essentially "even", with Rogers "outproducing" Hader in WAR by .5 (they were both in negative WAR territory), but with Hader returning to form recently and powering a Padres playoff run. Now, Rogers becomes a free agent and the comparison turns to Hader, with one year of control, and Ruiz and Gasser, each with six years of control. If Hader's performance in September and October is indicative of a return to dominance going forward, then we can probably pencil him for a WAR next season of around 3.0. This essentially means that all that has to happen going forward for the scales to tip back in our favor is for Ruiz and/or Gasser to become steady to key contributors over the course of their tenure with the Brewers, or for them to be traded for such players. Considering both of their respective performances in the high minors this season and their pedigrees, this seems to be a very realistic scenario. Which is why you have people like me saying that we need to wait before we can fully adjudge the trade and pursue Stearns and co. at the stakes and with pitchforks.