It would seem unlikely that Rafaela, 22, would be a huge upgrade over Jesus Sanchez, 25, who played half Miami's games in CF in '22 and has already shown extra-base pop in the big leagues the past two years (162-gm avg of 25 HRs). Sanchez did it in the minors, too, with a 1.000+ OPS in AAA, which Ceddanne hasn't even reached yet...
I don't doubt Rafaela's D, since I watched him from the stands last summer. But like you said, the Marlins are looking for MLB offense this year. Verdugo and Dalbec would seem most expendable...
But they're definitely preparing to deal a young arm, since they just sign Cueto. Scuggs on MLB.com says clubs are asking more about Cabrera over Lopez, coveting the big arm.