It's amazing how fast people will turn on a player.
If memory serves, this is more of a basic procedural thing than a real indication that things are going poorly. By filing for arbitration Nyquist forfeits the right to accept an offer sheet from other teams. In other words, he's committing to the Wings by filing.
Today is the deadline to file so the timing is likely a result of that, not something that happened with the Wings. I'm pretty sure this is something players do that's just a backup plan for a worst case scenario. And again, by doing so he cannot accept an offer sheet from another team.