I think Carrier is a decent upgrade over Ceci. He certainly is a much better offensive defenseman, and I don't think his defensive game is worse. Just my opinion though.
Colton Sissons could be a nice add to the Oilers line up as well. Right shot C/RW.
Maybe an offer for both these guys with Ceci and Janmark going back the other way would work.
So like
Alexander Carrier (RHD, 27, pending UFA $2.5 Million AAV) @ 50%
Colton Sissons (Right Shot Center, 30, $2.85 Million AAV for three years)
Cody Ceci (RHD, 30, One more year after this season @ $3.25 Million AAV)
Mattias Janmark (LW/RW 31, $1 Million pending UFA)
Oilers 2nd 2024
2nd round 2026 Conditional pick, if the Oilers make the SCF pick moves up to 1st round 2024)