This team has several tradeable assets, however, most of them are also key pieces to this team competing in the future. Unless team options are picked up, Sano is a FA after 2022, Kepler and Donaldson after 2023 and Polanco after 2024 (he has a vesting option for 2023). In addition, Rogers and Duffey are FA after 2022 and Maeda and Garver are FA after 2023. That's a lot of positions to fill. Some (most?) will be filled from within, so that takes Kirilloff, Larnach, Lewis, Miranda, Martin, Jeffers and most any pitcher off of the "tradeable asset" list, unless included in a package to fill a need long-term.
If the universal DH gets voted in, Sano and Donaldson become tradeable, but most teams will choose Sano because of age, contract and upside. If Kirilloff and Larnach prove they can play, Kepler and Sano become tradeable. Miranda and Martin may prove to be good UT types, making Arraez available. If Rortvedt shows he can hit, then Jeffers, and to a lesser extent, Garver, become available. Rogers and Duffey may best be used in trades to bring in more prospects. Donaldson either performs like last season, almost earning his contract, or doesn't and is DFA'd (think Pujols). I would hope a combination of 3B, DH and an occasional game at 1B could keep him on the field for 135 games or so. Miranda and/or Martin could make Polanco available, but I like him for 3 more season at 2B.
Unlike some teams, the Twins don't have much margin for error, the prospects need to pan out or the the reset button needs to be hit. Falvey and Levine's kids need to show that they are ready to be prime time players.