Obviously, Edmonton didn't believe that Karlsson was worth the ask. Instead, they acquired Mattias Ekholm, who put up 32 points and was plus 28 last season. This cost them Tyson Barrie, a prospect, a first and a fourth-round pick.
We can now see that Karlsson might not have been worth multiple first-rounders, as the Sharks settled for less to move him, instead taking multiple players as well as a first-rounder in the three-way deal with Pittsburgh and Montreal.