There is no other way to get to true championship contender status other than through the draft and development process.
Since the Rangers always augmented their team with mediocre UFAs over the years, just to attempt to make the playoffs, they were rarely in position to draft these championship caliber players and when they were, they drafted goalies or reached on low skill big players.
At this point I don't see what the problem is if they just go with what they have as no matter what they do, they are not going to be able to trade for or draft the players people seem to be asking for.
Might as well try to develop Kreider, Miller and the others. Might as well roll with Brassard, Stepan and Hagelin.
Short of trading them all for a real and true rebuild from the ground up I don't see any other option and I highly doubt management would even consider going that route. The fans do not demand it with their wallets.
It is painful to waste Lundqvist in the process if that comes to pass, but that ball was sent rolling years ago when they decided to sign a bunch of UFAs instead of just really rebuilding when the Jagr era was ending.
People seem to be looking at this from the perspective that winning the cup is the Rangers priority, to me it seems more likely after watching their maneuvers over the years that their #1 priority was to market the team with more well known name players. That way regardless of how the team performed, it raised the demand for tickets. They sell hope with name players and every year the fans buy into it. If they win, great it's a bonus, if they lose they just add a name player or two and start the process over again.