I don't think the Habs do this, because they kind of need Xhekaj to bring some size and toughness to their lineup and seem to still have high hopes for him.
But i really don't understand it from a Canucks at all either. Giving up a 1st and Hoglander, the two best trade chips Vancouver has...for a 4th line Center (when they already have eleventy billion Forwards, albeit not RH Centers), and a young, unproven bottom-pair defenceman with some durability problems? Dumping Poolman's IR contract is convenient, but not something pressing enough that i'd want to give up huge value to do.
If the Canucks are giving up a Hoglander + 1st Package...it should be for a targeted upgrade, with an established veteran at a position of need. ie. A bonafide Top-4D Upgrade. Even if that's just a rental.