I'd guess the club wouldn't be terribly motivated to move Bassitt as that reduces the team's starting depth a great deal, and opens up a rotation hole which needs to be filled by another pitcher likely outside of the organization.
I would be really surprised if another team was willing to offer any kind of value in return for Springer given the season he just had. I think he will bounce back at least somewhat in 2024, but he's seen his numbers steadily declining since signing with the team. He managed to stay remarkably healthy last season, but perhaps he would benefit from actually playing a bit less in future seasons to keep his body fresh as the season progresses.