I think Shero addressed signings like Duchene in his interview:
"I've said all along, with the support of managing partners, Josh (Harris) and David (Blitzer), that you don't build a team that's rebuilding through free agent signings that would handcuff you in 3-to-4 years," Shero said. "Doing something for the sake of getting a little bit better, or to just say you're doing something, is patchwork and not a plan. There's only one way to do this. The idea is to build something that once you do build it, you're in a good position each year to have a chance to make the playoffs and at a certain point you're considered a Cup contender.
Five Questions with Ray Shero
No offense to Taylor Hall and I hope the Devils resign him, but he will likely be getting in the $10 million dollar range. He has played in one playoff series. Duchene is likely in the $9 million range. He has played in 8 playoff games. IMO it does not sound like a great idea to have two 28 year old players taking up 20% plus of your cap that have never won a playoff series between them.