MLBTR says Marlins are "open to offers" on Pablo López and are looking for left-handed power hitting: link
I know the Baseball Trade Values simulator sometimes values certain players weirdly and maybe shouldn't be trusted, but for what it's worth, it views trading Larnach, Steer, and Canterino for López and Anthony Bass as almost a dead-even match.
In the real world, 2 out of 3 players on the Twins side of that deal are hurt or rehabbing, which probably will affect the value assessment somewhat. But this kind of framework for a trade, at least, looks realistic.