There's Julien and Lee who both will need spots, though at different times in 2024. Polanco, as long-loved as he was, was the piece to trade given his salary, and his recent injury history.
The best case was always to trade Polanco for prospects, and flip those prospects for major league help. This deal kinda accomplishes both, or at least gives us placeholders to explore our pitching depth and let it develop.
Too many are acting as if prospects are nonfungible. Maybe this trade makes it easier to deal prospects to acquire a player like Burnes at the deadline.
It's an objective good trade. Subjectively, it's sad to see Polanco go as our longest tenured Twin (along side Kepler).