They haven’t made the playoffs in 4 years lmfao so not quite
It's not just about making the playoffs - it's about building a team that can consistently compete for the Cup over a 5-10 years like a Tampa, Colorado or Boston.
The Devils aren't there yet, but the foundation is certainly in place. You have star players in Hughes, Hischier and Hamilton locked up on long-term deals (with Nico & Jack arguably on team-friendly contracts)...hopefully Bratt gets added to that list soon. They have tons of depth both at the NHL level and in their prospect pool. Additional potential high-end players in Luke Hughes, Nemec and Holtz still on the way. No really bad contracts on the books - the worse being Palat (5 x $6M, though it's structured to make him easier to move if needed after year 3)...after that maybe Hamilton (?) - though he's been worth every penny this season and his contract is structured that he could be moved after 2 1/2 seasons from now when he'll still only be 31.
The 2018 playoff may have hurt the rebuild as they dealt away 2nd and 3rd round picks at the deadline for 1 playoff win...though with the butterfly effect and all they still landed Hughes a year later, so it probably turned out for the best.
Best thing Fitzgerald can do is continue to be patient with this team. He's done a great job so far, whereas Shero tried to rush things in trading for Subban & Gusev among others. Based on everything Fitz has said, it seems like that's the approach he's going to take. I would not expect the Devils to be too active at the trade deadline - maybe some minor moves, but I don't see him trading away a 1st rounder or top prospects for a rental.