The FO was arrogant that's the vibe I got. They had the hard to find, elite talent pieces in place for the next 5 years. They thought Meier was that elite elusive power forward you "need" to win in the playoffs, and with him in the fold the window was open. Missing the playoffs was not even a consideration, and I don't think it was one they seriously considered until the loss to Detroit on 11/22. Then it was "oh shit we need a goalie," "oh shit our guys are really hurt," and "oh shit maybe our complimentary defensive players aren't as good as we thought."
It's why you hear rumors that the devils are looking for help everywhere.
I don't believe for a second they thought a season like this was coming, and missing the playoffs increases the likelihood of a dumb "job saving" trade going down this offseason. Ruff needs to go yesterday and the team needs to get some data to see how players respond to a different coach before the offseason, where at the very least goaltending needs to be overhauled.