Yeah they should do this.
As for the 40-Man roster, bump off some of those around 30 or older relievers like the guys you mentioned. Even Varland or Justin Anderson as well. Have as many younger, upside guys as possible instead.
Yeah I guess it's possible Baldwin is back at Charlotte to open the year, but then you need a placeholder at SS (unless Colson makes the team). Rojas isn't that guy.
They can already do that with the guys they have. Baldwin can cover SS with Amaya as the backup (also DFA'd for Colson when he comes up).
Edit: Rojas also hasn't played SS since 2021 and was negative there.