+/- is a really bad gauge for interpreting individual contributions.Lias is a massive plus-minus sinkhole in the AHL and NHL. How is he good defensively? His AHL numbers are awful too. He’s 20 year old AHL season should have been much higher. He’s going to play in Europe soon and probably not even score there either.
I look at Andersson as an opportunity for the Oilers to add a high pedigree player in a position they don't have a ton of depth at.
He may have the lower upside, but the Oilers have the ability to sit on Andersson as a prospect until 21/22. Work on offense, work on face-offs, work with the skills coach and assume this is a player who fills the 3C role moving forward one or two years from now.