Look at Senzel’s first year stats. What makes you think he is any better than Kieboom?
Uhhh.
Senzel hit .256 in 414 plate appearances in 2019 before his injury, with 12 home runs and 42 RBIs - with an OPS of .742.
I'd go all in for Senzel. Have him play his natural position at 3B and then Kieboom isn't forced to move positions. As a Nat he is blocked at SS by Turner and 2B by Castro.
Maybe a Senzel for Kieboom trade straight up makes sense.