You really think someone, such as Ottawa, would trade J.G. Pageau for Nelson at this point, because that's essentially what you are proposing.
Nelson's production at this point is basically that of a 3C, but he doesn't do any of the stuff away from the puck.
I am not proposing that trade at all, I specifically didn't mention any names. It all depends on team need.
If there is a team out there that sees Nelson's shot and thinks he can be a cheap second-line LW, maybe there is a fit for a player who plays a game like Kulemin but is a center. (Essentially a healthy Cizikas who can win more draws. Or, even better, a healthy Grabo.)
Other options include expanding the deal of course to include additional picks/players/prospects. I would think Ottawa might listen if it was say Nelson and one of the Isles second rounders for Pageau. They could then see if Nelson is a fit or even trade him for another pick/prospect AND their owner sheds an additional year of salary at $3.1 million.
Nelson isn't completely worthless, even with all of his faults. He just doesn't fit in the Isles top-6 anymore and isn't the grinder they need at center (assuming JT signs). But he could fit on a team looking for cheap offense for a season then bring back another asset if they opt to move him.