This. Basically there are 3 possible outcomes:
1. He goes on indefinite LTIR like a number of other players (Horton, Savard, Pronged, etc.). He HAS had back issues which kept him out all but ~20 games last season.
2. He gets healthy and bounces back as a useful (albeit overpaid) player.
3. He gets healthy and continues to suck, where Columbus just keeps him on as a 13th forward.
3. Columbus gives up a really nice piece just to move him.
Ranking them by preference, I would go 1, 2, 3, 4. But make no mistake, it's better for Columbus to pay him to sit on the bench and take up cap space than to give up a 1st rounder or nice prospect to move him. That's almost always compounding a mistake (acquiring/signing a player like that is the original mistake, giving up a 1st or a top prospect to move that player is just compounding the mistake).