They've enforced other recapture penalties (Richards, Kovalchuk). And I think the league could simply point to the fact that the owners signed the CBA which included the cap recapture changes.
If anyone doubts what progressive skin disorders can do to a person's life, read this story where former NHLer Tom Reid details the extreme discomfort of his condition.
Blackhawks’ Marian Hossa to Miss N.H.L. Season With a Skin Disorder
"The irritation forced Reid to sleep in a wooden, straight-back chair because he would not deal with the pain that came with sleeping in a bed."
With a bit of proactive manoeuvring the Canucks should be able to emerge with only a slight loss from the situation, if necessary.