The issue with Luongo is that he was injured enough that he could have gone onto LTIR. However, he chose to retire as the Panthers would have been on the hook for a some portion of his salary (as I believe his contract wasn't fully insured). So it helped out the Panthers saving money on him while just having him sit at home instead of working as part of the front office.
Honestly, that was my hope for the Canucks to get out of the situation with Eriksson. Tell him to retire and then hire him as part of your front office. Or just make his life as hard as possible (don't send him to the AHL, send him to the ECHL). Now, I think the Canucks are stuck with him for this year at the least.