It’s not a secret: the Vancouver Canucks need an upgrade at third-line centre. You know it, we know it and the organization knows it, too. In fact, Vancouver’s hockey operations leadership group has been quite open about how they consider identifying and acquiring a third-line centre upgrade to be their top offseason priority. Advertisement Finding good NHL centremen is far easier said than done. Barring an agreement between the NHL and the NHLPA to raise the upper limit beyond $1 million for the 2023-24 season, Vancouver’s cap situation is going to be tight. The Canucks will need to make some…