By the 2017 Stanley Cup Final, Lundqvist will be 35, Nash and Girardi 33. These are all key players for the Rangers playing as the starting goalie, first liner and first pair D. The total spent on them is $21.8 per season or about 30% of the cap. All are showing signs of slowing down, as does Marc Staal. With Staal, the 4 take up almost 40% of the cap.
With Yandle, Boyle, Moore and Eric likely gone, the team will be even worse. Replacing Yandle with McIlrath/Skjei is a distinct downgrade. Eric and Moore being replaced by Lindberg and Hrivik is a bit of a downgrade too, if only because it means less depth. Stalberg will need to be replaced too, though that should be easier.
So overall, the team should be worse next year due to losing Yandle and depth, and the aging of the team's top paid players. At the same time, because so much money is tied up in slowing/rotting players, it's doubtful we can sign someone as good as Yandle or even Eric Staal.
The window is closed. The best course of action now would be to sell-off the team for picks and prospects, taking up 50% of the salary to maximize the return, while loading the team with ELCs.
Everyone 28+ should go: Brassard, Zuccarello, Nash, Klein, Girardi, Staal and Lundqvist should go. If you retain 50%, you can get huge payments for these, even for Girardi and Staal.
This, of course, won't happen. The team will run into the wall again and again, drain the last few prospects in the system in a desperate attempt to win, then 5 years from now, after the farm has been emptied and guys like Zuccarello and Brassard no longer have value, and even McDonagh can barely bring back anything, we'll do a half-baked rebuild that will again take 10 years to become a contender.
Hope you enjoyed the 2014 Stanley Cup Final, we'll be back there in the 2030s.