It all sounds pretty stupid - the words coming out of the mouths of those saying it's great, that is. Everyone was not "demanding" a return of world PvP, or complaining that some of the zones were quiet, so suggesting "they" were is blatantly idiotic.
There's a difference between a player wanting to be able to PvP in game, and wanting to be constantly graveyard running while trying to level. Particularly if they're new to the game, and don't have friends or alts to kill people ganking them with. Either way though, things like stupidly large groups of players taking over the dark portal; where zoning makes it impossible to fight back suggests people aren't interested in "world pvp" so much as exploiting game mechanics to kill people with no recourse.
Either way, I hope it does result in a lot of sub losses, and new players losing interest. Because it's what Blizzard deserve for not foreseeing this, and we'll see which groups are the real sulking "care bears" when lower subs mean waiting twice as long for new content of even lower standards.