To be honest, this happens to single player games as well. Doesn't mean that these games aren't good. Hell, Bioshock Infinite was missing a lot of stuff shown at E3, yet it was still a great game.This is why I'm always surprised when people buy into hype. Like actually defend it. There is no game I can think of that actually delivered on everything they set out to do when initially announced or it didn't turn out as expected. Why nobody thinks that's going to happen here, especially from a company with a track record like SOE, is mind boggling.
Not saying EQ Next will be everything people are hyping, I seriously doubt it. But it could still be a fantastic game. Hell, even EQII turned into a fantastic game eventually.
I also think that expecting MMOs to be perfect from the beginning is a bit dumb, especially since they change constantly. If SOE is smart, they will have a year or so beta like WoW did to make sure this game is ready for launch.