Revisionist history if I ever saw it.
11-12 was the first year of the window. Of the 21 players who played in the playoffs that year, 11 were Rangers draft picks or UDFAs. Another two were picks of other teams who broke into the league with the Rangers (Boyle, McDonagh). Two were shrewd bargain pickups (Stralman, Mitchell). One was acquired via trade (Prust). 4 were regular UFAs (Richards, Gaborik, Fedotenko, Rupp). The last is Eminger.
That team was largely homegrown. 15/21 essentially breaking into the league with the Rangers. Nearly every one of the 15 was brought to the Rangers by Sather during a period of so-called mediocrity.
So yeah, Dubinsky and Anisimov get traded for Nash. Del Zotto gets traded for Klein. Callahan gets traded for St. Louis. And over the years, Boyle, Mitchell, Stralman, Hagelin, and Bickel all move on for other reasons, many of them cap restrictions. Gaborik gets traded for some of the depth we lost in the Nash deal, part of which ends up getting us Yandle. Some of those players get replaced by more homegrown assets like Zuccarello. And yeah, other prospects and first round picks get traded for "missing pieces." The 13-14 team had a grand total of 2 typical "Rangers" UFA signings: Richards and D. Moore. The other UFA who hadn't been on the 11-12 team was Pouliot, who more or less falls in the same category as Stralman. Everyone else was either a draft pick, UDFA, or trade.
But that team was built from young assets acquired during a period of mediocrity. You joined in 2008. Don't you remember all the predictions about how we will always be mediocre unless we tank?