Yeah, the Rangers really did everything right around the leadup to the 2014 team. They had some banger trades, so obviously luck is involved, but still...
They rehabilitated high picks with skill as role players (that's where Florida got Bennett from, let's not forget, not paying $69 million for somebody's third liner). They rebuilt their defense around passing ability (McDonagh, Stralman, Klein). They got everyone to play a system that was based on straight hockey with speed.
By 2015-16, they were an East-West team that was already slowing down, had an immobile defense, and lost their speedy forecheckers only to replace them with useless grinders like Stoll and Glass. It took them two years.
They looked at the loss to LA, blamed it on everything they did well, and doubled down on everything about the team that was a negative.
Florida got lucky with some acquisitions like all winning teams do, but recognizing what makes you good is an ability, and it's one we don't seem to have.
A decade after 2015-16, we still have one of the least skilled defense corps in the NHL and we just keep shoving our chips to the middle of the table on it.