They don't have first line caliber players aside from St Louis. Honestly, if St Louis' mother doesn't pass away, they would have rolled over versus the Penguins. That event caused the team to get closer and rally around together and play some really inspired hockey.
The Rangers are going to go the route of the devils after their cup run. They are going to lose Richards to a buyout, Nash is terrible and has an albatross of a contract, St Louis will be retiring soon, their prospect pool is the worst in the league and they don't have their next two first rounders. Also, as good as Lundqvist is, That contract is brutal and will look even worse in a few years. The future is bleak for that team.