You're talking one guy in a small sample breaking even with his AAA stats. Historically, its more likely to be from ~.825 to ~.650 when bumping up 2 levels.
Brewers already view Ortiz and Hamilton as speedy players with great defense and young with upside, and their numbers are already in line with that and have a level of trusted experience and proven defense. If the brewers were concerned, they could have easily moved prospects to get a bat with more pop for reasonably low prospect capital.
Its debatable whether at his current age and level that Made would outperform either of those 2, thus giving him little or no value to the club right now.
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But more to the point, Brewers built a contender very meticulously over many years despite the obvious limitations by being incredibly shrewd with money and talent.
Made as the #1 prospect has a surplus value of ~$95 million, meaning at current expectations, he will add $95M value/savings. Most of that value comes towards the end as he gets close to prime years, say $18M and $22M for argument sake over those last 2 years.
So, the brewers could have swapped Hamilton or Ortiz and a prospect for an upgrade and taken a $5M value hit (which many fans thought was the right play) or they can risk 2 years of $40M value for an unlikely upgrade.
Thats not how this org is run, nor can it be run that way if they hope to remain contenders.