what are we missing?
You’re basically asking us to tell you what things Anet are going to announce but haven’t even hinted at yet. Which we can’t possibly know.
We have a vague idea for some things, for example we don’t know how many maps there are going to be, so that’s got to be announced at some point. And we can assume from the set-up in the living story that there’s going to be more story, which will probably end with us killing Mordremoth.
But as far as features, mechanics etc. go until we’re told what they are, or at least that they’re going to add something relating to XYZ, we simply don’t know.
“Life’s a journey, not a destination.”
Things they have said they will reveal but haven’t yet;
Elites for 6 classes
More Revenant detail
Challenging Group Content
Legendary Weapons
Other stuff we might get more info on;
More masteries stuff
More lore stuff like the Hylek tribe blog
Info on the maps
Information about new crafting upgrades, Jeweling and Cooking to 500, it’s about time this was done.