I wrote this on another page, but to me cutting ties with Santana makes the most sense. How can you have a 38 year old who provides almost zero offense occupying what has historically been an offense-first position? And if he's not getting time at first, then he has no value to this team. Do you really want him to just DH and pinch hit? Margot can at least kind of play the outfield. (Although he should be DFAd in favor of Keirsey.)
As the playoff picture stands right now, the Twins are a bubble team. If they miss the playoffs by one game will Falvey be able to look in the mirror and say he put out the best team possible on a daily basis? If they keep giving guys like Santana and Margot at-bats the answer is "no".