I think we're seeing a new kind of dynamic developing. Top teams have their "core" players Pav/Dats, Kane/Toews, Crosby/Malkin etc, the key is the supporting cast around them. You get a good supporting cast of cheap young players and cheap role players, but then those cheap players leave for for more money and you lose all your depth, so you have to start building your depth again.
I think success is going to go in cycles for the top teams for the forseeable future.
I agree with this, Pavel Datsyuk is equal to two of their best players