Well, needing to do something and actually doing it have always been different animals when it comes to hockey teams. The Devils went for it this off-season both in an attempt to be a better team and to show Hall they're serious about competing so he'd stick around--and it backfired hard. They're arguably worse with a bunch of new, big names, and Hall is all but gone already.
Murray was never close to this position in terms of potentially losing his starting job though. I don't care what DeSmith or Jarry did in the AHL or CHL or whatever.
Jarry is clearly outplaying Murray now at the NHL level, by miles, and has a legit shot at taking over the starting duties if things continue the way they've been going for the first 2 months of the season. I'm not saying it's a sure-fire bet that Murray is rattled by Jarry's performance, but it's an interesting thought considering he doesn't seem to be improving or even plateauing, but continuing to regress as Jarry continues to get better. It's likely just a coincidence, but intriguing nonetheless.