Blizz has said they want to make the leveling experience easier and is offering free 90s and paid for 90 services to make this so. But, on the other hand, all they have revealed thus far is once you reach level cap at 100 it turns into a hardcore game and very elitist. After the MoP daily fiasco it is apparent they still haven't learned that casual players even with free 90s will not have the urge to continue to level cap and continue to grind at 100 if you put so many artificial barriers towards participating in PVE and PVP.
Stratifying the player base may sound a good idea relative to your gear level but when it comes to proving grounds, and other methods that is heading towards a bad place for a game. Games should primarily be about fun and the fun is being sucked right out if you have to meet requirements to participate in the end game. Basically, casual players will walk away, just like they did in MoP because they don't see the value or fun of what Blizzard is trying to herd the player base into a narrowed path.