Wow I agreed with all your points one hundred percent... someone else on the interwebz who actually understand MMO's and how someone should approach them.. I am amazed.There simply is no game studio that can produce content at the same pace as their most avid players devour it. It's flat out impossible.
You either have to pace your consumption of content, do some of the content repeatedly, or play multiple games.
Expectations of "I want a game like WoW, except with a new raid and half a dozen heroic dungeons every three months" are unrealistic.