Bullshiit Steamer projections aside, Hamilton was actually worth 1.7 fWAR in 98 games, which extrapolates out to 2.3 fWAR in 136 games. He’s not a step down from Moore. At worst, he’s an equal, and as he’s 5 years younger, is more likely to improve.
Moore’s Gold Glove was undeserved. Ceddanne Rafaela played multiple roles and fared better on the defensive metrics.
That said, and despite Hamilton’s significantly greater surplus value than Castillo’s, I’d be surprised if even Dipoto entertained that offer, as my guess is the primary reason Castillo is potentially available is because he’s marketed as a “low cost” starting solution…