Not only have the Rangers earned the right to do this....in the words of fellow MSG denizen Billy Joel from "The Stranger": You've done it, why can't someone else? You should know by now, you've been there yourself....
We rested Chara and Bergeron after we clinched the trophy last year. It's not a "we want to face OTT and not BOS" thing. It's a "we want a well-rested team" thing.
As far as the 17% win rate in back-to-backs...that can't be right, can it? From a few years back:
http://www.thehockeynews.com/articles/44348-Campbell-The-impact-of-backtoback-games.html
Even counting loser points as complete losses, that's 41%. Now, that includes home-home and home-away/away-home back-to-backs. It's possible that the sample size for away-away is small. It's probably also skewed towards games with an Eastern Conference team against ANA and LAK - and perhaps towards games with a Western Conference team against FLA/TBL.