OP, this is actually a no brainer for both teams!
Yzerman instantly accepts this & Allvin instantly rejects it.
The Walman Special (adding a 2nd to trade a dman you recently signed) probably isn’t enough to motivate the Canucks. It’s just a bad fit for the Canucks. They’d be crazy to trade a big, SCF experienced, defence oriented, PKing defenceman for another smallish offensive “PP specialist" dman.
Bad trade for the Canucks aside, I do like what you’re trying to do here. It’s a long shot but it would be nice to find a “hockey trade” for Gus that can help out the PK.