For me, it has always been about beating the hardest difficulty in WoW, if i did that i wouldnt play until more content came. Unfortunately my guild disbanded on HM LK in wotlk before we got him, so i quit feeling let down, because i now dont have time to raid at that level. If i can achieve the hardest diffculuty in GW2 say a month after getting level cap, why would i do more content with the same difficulty, thats just me.
I have to go to work though, i do hope you all enjoy GW2, i really do. I just dont think you will a,d feel the developers are making a mistake.