Going into next season--the questions are whether Stralman (UFA), Diaz (UFA) Falk (RFA) come back. The Rangers have McDonagh, Girardi, Staal, Klein signed and Moore (RFA) will certainly be qualified. Allen could push for a job and if Stralman or Diaz don't return you can almost expect that the Rangers will sign a NHL quality free agent. Our defense is not a worry but the Rangers need to make sure they have enough depth. McIlrath is next in line and Bodie pretty much IMO would go to the top of the food chain after that if the Rangers do sign him. And then there is Skjei who is coming along very well but I expect will do another year at Minnesota U.
Nothing wrong with signing free agents if you have openings. If they develop into NHL worthy players--they'll make your team or they're assets you can move for other assets. Never can have enough quality defensemen IMO.