This had to be something seriously weighing on him; whether his vertigo, past issues, injury concerns post-concussion, newborn at home, etc., highly doubt he'd be walking away from serious money and the sport he loves if it wasn't a big deal. Hope he and his family are alright.
As for the Devils...yeah, this definitely sucks, and absolutely hurts the team's chances of surprising anyone or being able to go on a nice run by taking advantage of having one of the division's better goalie tandems in a condensed season. Big picture, though, we know this is a development year: the core storyline of this season, no matter what, is "how much do the young guys develop?", and this doesn't change that reality.
Nico will get healthy, Bratt's contract will get settled, and we'll be seeing them along with Hughes, Blackwood, Smith, and others, and their collective development is still the most important thing to watch in 2021. Would just like to see a halfway decent backup goalie brought in for the sake of entertainment, since I think we're all pretty tired of having games that feel like automatic losses based on who's in net after the past couple of seasons.